The Web Version of MSN Messenger is ready to go... 
This is a great idea and a great feature for MSN Messenger... if you're out and you can't install MSN on your PC, you can keep in touch with your friends simply by going to the MSN Web Messenger Site and login on it.
Only a little alert about it... it requires that you turn off your Popup Blocker, and it's really noise. Windows XP Service Pack 2 doesn't have a Popub Blocker turned on by default? I think there could be some little problems... 
MSN world is in a continuous big improvement phase... Blogging services, Search capabilities (on the web and also on the desktop) are only an example of this. Good!