Apple iPhone 3G (16GB, black, AT&T)

Pros: The mobile safari browser superior to windows mobile browser. Syncs beautifully with iCal, iTunes, iPhoto/Aperture, and Address book. MobileMe goes beyond MS Exchange by working across platforms. Slim for a smartphone

Cons: Battery life leaves much to be desired. Turning bluetooth on/off is inconvenient for a phone. The camera is a bit weak. No flash support (yet?). App updates sometimes do not work properly.

Summary: If you have a Mac there is no better smart phone to have for keeping your digital world organized and synced. MobileMe had quite a few hickups at the start, but works very nicely now across the iPhone, Macs, and PCs (yes I use it on all 3).

It's really nice to have the full web at your fingertips and to be able to render web pages as they were intended rather than in the squished form seen on a windows mobile device. Also, the on-screen keyboard is designed for your fingers, not a stylus like the on-scree keyboard on Windows Mobile Phones (I had the AT&T Tilt before, I got so frustrated with it that I got the iPhone before my contract was up)

If you carry around an iPod for anything other than going to the gym, you will probably start to leave it at home.

There are a lot of free apps in the iTunes App Store that are useful, and there's one place to go to get applications. Try finding a reliable, central place to get applications for a windows mobile device. All those I found were difficult to navigate at best, and useless at worst.

Battery life is manageable if you can charge it nightly or turn off features not being used (ie 3G in non-3G areas, wifi/bluetooth when you're not using them, etc). It would be nice if there were 1 menu accessible from the home screen to turn bluetooth, 3G, and WiFi on/off rather than needing sub-menus for each one.

Bottom line, I've yet to see another phone that I would give up my iPhone for. I don't care if it's open like Android or Windows Mobile, I want to be able to add things to my phone and know that it will continue to work. The iPhone does exactly that.