Google wave - cool

Combining email, instant messaging and wikis seems like a recipe for confusion, but Google Wave pioneers a new generation of web applications, where everything is instantaneous. As Google explains, each wave is a hosted conversation and users can edit the conversation in real-time.

Google Wave wants to revolutionize real-time communication by extending a protocol mostly used for instant messaging, XMPP.

Google Wave is about to open to new users. Starting today, Google will send 100,000 invites to some of those who were eager to use an early version of the service. Google's blog lists three categories of users that will receive invites: Google Wave Sandbox users, those who signed up and offered to give feedback on Google Wave and some Google Apps users. When you receive an invitation to Google Wave, you'll be able to invite other people so you can use Google Wave together.

Watch the youtube in this link which explains some features of the google wave
This sounds cool
http://googlesystem.blogspot.com/2009/09/new-batch-of-google-wave-invites.html