• It comes with WM6 which is a great improvement from Windows Mobile 5. It is faster and works well with my Vista desktop for syncing (there is a simple app now to turn off the Proxy if you want to tunnel from your phone through your desktop to the Internet).
• Internet connection speed is better with 3G than the old Edge.
• Connectivity to my WiFi or 3G just works! The old phone required going into connections, etc..
• WM6 allows you to close running applications in stead of having to go to the system settings to really close them.
• Works with new Office file document formats (e.g., .xlsx, .docx) for viewing in Office mobile.
• It does a better job of multi-tasking particulary with Internet connectivity and voice.
• The bluetooth stack includes A2DP which brings me to one of the coolest features. Stereo bluetooth! I have tried several (stereo) Bluetooth headsets. The Motorola S9 rocks my world. No hissing, excellent battery life, controls for Windows Media player on the headset as well as controls for voice commands and hands free.
• I like to listen to music while playing poker so having my mp3's on my 4gb micro card and wireless stereo headset is the bomb. Note that you can really save phone battery life by doing the following. Set the phone to enable BT, turn on the headset, start playing your favorite music with Windows Media player, then press the power button on the phone which puts it into stand by (screen shuts off, etc..). On the headset, press the play button. Music plays while the phone screen is off and in battery conserving stand by.
• I like the touch screen (borrowed from the HTC Touch) that allows scrolling in apps like the browser and Word with a flick of the finger. Granted the pressure sensitivity and full functionality isn't as good as the IPhone.
• It has a built in GPS which I use with Live Search, Google Maps, and stamping my photos with the Lat/Long.
• The camera is 3.0m but the quality could be better. I miss the "flash" that was on the 8125. It wasn't really a flash but rather a light I used as a flashlight.
• I LOVE the exchange email push feature. My mail and calendar are always up to date. Previously I would *get* my email but its nice to have it there when I launch Outlook.
• I still use Spb time for my alarm since I believe they still haven't fixed that phantom alarm issue with WM I spoke about in a previous post.
• One of the main reasons I love the phone over the IPhone is; BT (bluetooth) which can be used for stereo headsets, a Modem, and the myriad of Apps you can get on a WM device (like PocketTV to view .mpeg).
• The IPhone has a better screen resolution as well as a bigger screen. The WM Truetype setting does help.
• I really like the breadth of input methods - Scroll wheel, touch screen, scrolling via touch, the buttons, the slide out backlit keyboard, and the Stylus.
• Oh yeah, the screen tilts up as well. I really like this feature (particulary after turning off that annoying swoosh sound).

Want to get even faster cell data connectivity (3.5G), or reassign the PTT button, or change some annoying registry settings then check out these links;

http://www.jongma.org/KaiserTweak/ 

http://www.htcwiki.com/page/ATT+TILT

Remap PTT button:  http://forums.wireless.att.com/cng/board/message?board.id=cingular&thread.id=66438&page=2

My wish list for the perfect phone: Better resolution (can skip VGA due to power but get something at least as good as the IPhone), Smaller form factor with a bigger screen or another screen in place of the keyboard.