Google Wave, a new service that melds e-mail, instant messaging, online forums, and wikis into a grand messaging service. The concept is a little complicated, and that actual launch date is months away.
It all started when Google asked itself, "What would e-mail look like if we invented it from scratch today?"
At the blog of the original developer the beginning of it.
At the complete Wave Guide
To make sense of it all, we have compiled key information, definitions, and links related to the launch of Google Wave. This in-depth guide provides an overview of Google Wave, discusses the terminology associated with it, details information on Google Wave applications, (i.e. the Twitter Wave appTwave), and goes over ways to keep yourself informed. We know you’re excited about Google Wave, so here’s what we think you should know
At the developer preview at Google I/O you will see a 1 1/2 hour presentation of the developer version.