In the box:
BlackBerry Curve 8900
Carrying Case
Battery & Charger
Stereo Headset
USB Cable
microSD Card (256MB pre-installed in the phone)
SIM Card
BlackBerry User Tools CD
Start Guide
Tips & Tricks Card
Since I want to use a 4GB microsSD card, I wanted to take their 256MB one out, and it took me a while to figure out how to remove that old one... in fact, my wife had to do it. The problem is that there is no User Guide, unless there is a PDF on the User Tools CD, so I had no handy removal instructions.
Charging -- I am so used to my 8310's flashing green LED and then solid when fully charge, that I was disappointed to not see any light whatsoever while charging our new babies, and I still haven't seen any LED for any reason yet. Options>Status shows that I'm fully charged, so now it's time to start playing with it.
The screen resolution (even with just the default 8900 wallpaper) is FANTASTIC compared to my 8310!
Now that TMO is obviously shipping, I hope that all of you who are waiting will get yours SOON.