Google talk beta

Google released the beta version of their instant messanger Google talk which supports text messaging and also voice calls à la Skype.
The installation is very quick and the software seems pretty lightweight.
Google talk uses the Jabber/XMPP protocol which is supported by these IM clients.
Gmail-users have a nice addon with Google talk because new messages are notified within the messanger.
I am missing the support of video-communication and other common IM clients like ICQ, MSN etc., but Google talk is still in beta so let’s wait what comes next from Google – what about Google OS