GOOGLE給我的邀請提示裡說到:

Invite others to Google Wave

Google Wave is more fun when you have others to wave with, so please nominate people you would like to add. Keep in mind that this is a preview so it could be a bit rocky at times.

Invitations will not be sent immediately. We have a lot of stamps to lick.

Happy waving!

恩..重點就是說想加入的人很多. 而GOOGLE很忙. 所以你們即使受到邀請. 也不會立刻就能使用