Google Wave is an online tool for real-time communication and collaboration. A wave can be both a conversation
and a document where people can discuss and work together using richly formatted text, photos, videos, maps, and more.
At this point, it may take a while to get an invitation to use this early version of Wave. The links below are some articles for more info. as well as the official google page where you can ask for an INVITATION to be a user.