Ok, ever since I got invited to Google wave (and am among those sharing invites)
I thought Google Wave might be really useful to do some kind of RevTK project with,
but I don't really have any ideas... so I thought I might ask here.
What do you think it could be used for?

Might want to ask on the Kanji Koohii wave.

Just a heads up, that Google Wave is now open to everyone, so something like this might be more feasible in the future.