Btw: although there are MANY MANY new and cool features (shown below) I have had trouble using the video chat feature, so be careful.
Windows Live Messenger 9 Beta Features
* Multiple Points Of Presence Suport - Now you can sign into Messenger v9 from several different locations and remain signed in, In v8.5 and under, signing in at a new pc will sign you out anywhere else.
* Signature sounds - Make sound signatures instead of just graphical ones
* Per contact sounds - chose a sound to associate with each of your contacts’ actions
* Animated Display Pictures - now you can use animated .gif files as your display picture
* Links in Status Message - Links in the status message are now clickable
* SPIM reporting - report and block users who spam you via IM.
Disclaimer: Windows Live Messenger 9 Beta Features mentioned in this post are just for the purpose of information and awareness and may or may not be present in the actual version of Windows Live Messenger 9 Beta.