The review in Ars Technica (link posted in another thread) said it was pretty much lacking in features found in more popular IM clients.
No group chat.
No file send capability.
No emoticons.
No view of previous conversations.
No skinning. (that one might kill it for WC folks)
It is supposed to have good integration with Gmail, and they were able to open it under Trillian.
There's also no current Linux or OSX versions available.
I think I'll wait until they get some more common features integrated.