Google Wave Clients for Mac Users and iPhone Users
If you're a Mac user and holding an invite for Google Wave, then there is a good news for you. Now you can use Google Wave via your Macintosh desktop using Waveboard.
There is also a iPhone app available soon for iPhone users. (A video demo is below.)
According to the application creator, it is waiting for an approval for the iTunes App Store right now. Meanwhile, iPhone users can run Wave by simply accessing http://wave.google.com/wave in Safari.