Wave as you wish me goodbye ...

Google Wave is coming - a tool that is "shared, live and in equal parts conversation and document".

Or brings together most of the things most people do online - email, message, upload and edit media ... all in real time. Invites are said to be going out to 100,000 early adopters to help finesse the tool.

Here's a Sesame Street-style demo:

Does it have possibilities? Will it catch on?