Initial notes: I have to say, that just my initial take on the 6800 is almost all good. I absolutely love this phone compared to the 6700.

Pros:

• Stuff Seems to Actually Work: I really loved the 6700 when it was working properly which at least for me was only like 90% of the time. The other 10% made me want to chuck it into a brick wall. Anyway, it's still too soon to give my complete blessing to the 6800, but everything seems to be working great so far. Notably, I have *never* had to wait for the device to wake up and be ready to accept input. This is far better than the 6700 in my experience.
• Loudness: I realize this may sound weird, but perhaps my favorite feature so far is how loud I can make the 6800. The 6700, at it's loudest setting was fine for normal circumstances, but didn't deal well with road noise or other situations where ambient noise was present. The lowest volume setting on the 6800 is similar to the loudest setting on the 6700. The sound quality on the 6800 is great.
• Audible-Feedback (side-tone): One of the challenges for people when they get their first cell phone is that they cannot hear their own voice through the speaker like they can on a traditional wired-phone. This may lead to them to speak too loudly. Only a few Motorola's (in my experience) have this audible-feedback capability-- where the talker hears their own voice in the earpeace of their cell phone. I'm delighted to say that the 6800 has this feature, and I love it. This feature isn't actually an echo, but lets you know how you are sounding to the other party, and doesn't cause any problems for communication. Just the same, there are folks who prefer the modern world of dead-silence during pauses and when they speak. This is not a user-selectable feature, so if you don't like this, better get a different phone.
• Size and Shape: It's actually not that much smaller than the 6700, but every bit helps. The lack of a stubby antenna is great. In general, much easier to hold and keep in a pocket.
• Memory Card Location: I wasn't pleased that they moved to yet another memory card size, but the 6700's mini-SD position would often cause the card to get accidentally ejected. I bought one of the 2Gb cards back when they were expensive, and in addition, I had important data on the card. Anyway, I grew tired of finding the card in my pocket separated from my phone. The 6800 uses micro-SD (transflash), which is not only much smaller, but recessed into the botton of the phone. I don't think it will accidentally get separated from the phone.
• Speculative About Processors: While I'm wedded to an PDA phone with calendar and email, the thing that almost killed it for me was having a phone call come in that I could not answer. The phone would ring, and the screen would even say "incoming call" yet hitting the green button, or "answer" did nothing. In some cases, I'd select the same option repeatedly while the phone was too busy to respond just to get it to do something. The early 6700 firmware was prone to stacking up "hangup" buttons and selecting flight-mode, effectively turning the phone off. I've been told this one has dedicated processors for the phone and PDA functions and so far it feels like it (which is very good thing). I have not yet had a problem getting the phone to "wake up" and start listening for button presses the way the 6700 often did.
• The camera: Quality is the same as the 6700 (or perhaps slightly worse), even though they now call it 2 megapixel. Unlike the 6700, I can actually start the camera application and take a picture within a reasonable period of time (although it is still slow).
• External Antenna: This model, like the 6700, continues to include an external antenna port -- which I really like and use. In my case, I have a car cellular antenna that I like to use.
• Windows Live: Not 6800 specific, but Windows Live really is a cool application. Note too, that Google Mobile now exists for Windows Mobile devices which is similar.
• RF Performance: ##debug# on both devices seems to indicate that the 6800 does marginally better than the 6700. I've also had good experience with the device in practice as well. Even in weak spots, it seems to fair as well or better than the 6700.

Cons:

• Silence: Almost every phone I have ever owned has had a quick and simple way to silence it. Often a physical button I could simply slide to vibrate as I walked into a movie. Alternately, pressing volume down when not in a call lowered the ringer volume, and either doing this repeatedly or holding it down would select vibrate. The 6800 seems to lack any simple external button press that will silence the ringer. This was a weak point on the 6700 but pressing volume down repeatedly would do the trick. The 6800 has a rolly-wheel for in-call volume and scrolling web pages (which by the way is cool). The big downside is that the rolly-wheel has no effect on ringer volume. The only "tricks" I've found thus far is to tap power (to wake it up), then hold power to get a power off prompt. Click yes, and this turns the phone off. I am aware of no shortcut to simply select vibrate.. Alternately, tap the speaker icon once, then move the rolly wheel down. I really wish they would have never included a dedicated WiFi switch, but instead gave me the same switch to select vibrate-only, which for me is something I need all the time, and I almost never use the WiFi.
• Windows Mobile 6: There's so much they could have done to improve the new Windows mobile. Sadly, this thing's OS appears almost exactly the same as Windows mobile 5. This means things like a week view that still doesn't show actual appointments (like Palm has done for years). They continue to notify you of new email and there's no easy way to turn this off. Why would anyone ever want to be notified of new email? I get new email every minute (so there's no need to ever ask if I have new email-- the answer is always yes). Subsequently, new email notification-- which is the same icon as voicemail, is painfull. I really do want to know if I have a voicemail, I simply don't care to ever know if I get email. I still lack the ability to set notification options for calendar appointments like 25 minutes before my meeting, then every 5 minutes until the meeting. Don't these Microsoft people ever touch a Palm device? Palm is still infinitely better for the basic function of calendar and email-- I wish Microsoft would simply copy their best features-- or at least come up with their own ideas that are better. Windows mobile still has the dorky duration bar. So if you schedule a 30 minute meeting, instead of showing 30 minute slot, it appears in a one hour slot with a small grey bar to the left showing 30 minutes. Geez guys, please look at what Palm did, and either do something better or at least copy them.
• Voice Command still not included: $550 for this phone but they didn't include voice command, or a cradle. I already own voice command 6, but having it integrated with the OS would hopefully make things more stable and reliable. Cheaper $100 phones include things that work every bit as well as voice command for making phone calls (which is what I care).
• No built in 2.5mm jack: They do include a miniUSB headset, and two adapters including one that gives you a headset jack. Note too, that other devices are now using mini-usb headphones so this is becoming more common. Even "Best Buy" has mini-USB headphones for sale.