I have T-Mobile service with a 7100t. I'm not sure why this mobile web page wasn't included with the pre-installed bookmarks, but it wasn't!! http://mobile.blackberry.com
This really cool home page is designed and formatted just for BlackBerry's by BlackBerry. It contains: 5 FREE games, a couple of free ADP ringtones and some free wallpapers. Not to mention links to quite a few popular mobile web sites.
This post shouldn't be a suprise for most I'm sure. But for T-Mobile customers, it might be a pleasant one!