http://spaces.msn.com/members/overdo/
Screenshots shown here as well.
quote:
Guess what landed on my test PC today 
1. "New style" sign in window - minimalist
2. CNI error prompt if your passport is not authenticated to be on the beta program
3. Video Carousel and expanding contacts options
4. Timestamps option 
5. Alerts options - Video Carousel and Shared Folders
6. Shared Folders options
7. Windows Live OneCare advertising? Option to disable unsafe file type restriction
8. Messenger 7.5 standard sign in window, complete with Display Picture
9. Shared folders - create/open
10. New WMP11 style drop down menu if the top bar is hidden
11. New Messenger Beta logo
Edit: Someone asked me what Video Carousel was:
Windows Live Messenger keeps you updated on the latest videos from MSNBC. Opportunities to watch new videos are available from the main Messenger window. While you currently cannot control which videos appear, you can control other options of this feature.
