Microsoft have actually done something to benefit the users of Windows Live Messenger, something that should have been done when it was released. Well, better late than never!
The news isn't so good for other tools like Plugoo, a tool that similarly lets users talk anonymously with their visitors through a flash interface by adding a bot to their contact list. While Microsoft haven't gone with flash, the simple form doesn't require you to add a bot, but either requires users to sign in via their Windows Live ID, or makes anonymous users enter an anti-spam word, which may put some people off using it.
Go fiddle. http://settings.messenger.live.com/applications/WebSettings.aspx
(Full article and explanation and stuff on the messenger blog, here.)
Edit: Or, you could use mine - updated with the Windows Live API - http://status.aelabs.net/.
