Google Wave is a group collaboration tool which makes it easy for several people to work together on a single document on the web. Google Wave combines some of the best features from modern web applications such as email, instant messenger, wiki’s and forums into a single hybrid interface.

Rather than pass multiple copies of messages back and forth, Wave hosts a single copy of a conversation that all participants can edit and add to. Wave displays the latest version of the conversation to everyone in the group in real-time, even as it’s changing. One can reply inline right beneath a certain part of the text with one click, and others can respond to one’s inline reply in that thread. Wave sounds a whole lot like instant messenger.

With Wave one can’t: Remove participants from a wave if that participant is not a bot; make a wave read-only; delete waves or remove participants from waves; prevent someone you added as a participant form making the wave public, and thus exposing a potentially private conversation; upload files.