I just got my Google-Wave account.
I'm granted to invite up to 8 people to participate. I think I could give three or four to the wild.
Anyone interested? Since they seem to select, I can can only suggest them to take the volunteer. Possibly it can take a while...
To invite (suggest) a person, I need the mail-address, either here or in a PM (a Google-account is needed for Wave, but can be created after receiving the invitation).