Never heard of it... would it help? I have a google account so as long as that's free I could probably access it easily...
Edit: I'm looking at it now... I'm putting in a request to get accepted into it...
There is a field in the invitation request that allows you to write a message to the "Google Wave team." I figure writing something useful would be beneficial... here's what I'm thinking:
I am currently creating a board game that is in its alpha phase. I currently have several people help me test it, but seeing as we are communicating through online correspondence while using a text based version of the game, it would be highly beneficial if we were able to test it in a live setting, such as Google Wave.
That's pretty much all I got right now... any suggestions?