Waveboard: an iPhone app for Google Wave, coming soon (via @orli )
There was already the safari based version, soon the desktop version which i guess will be better from a user experience point of view (made in germany according to the accent)
In the meantime there is a mac client to download here [tested it, nothing really different from the browser experience, which you could get by adding a fluid browser to your menu bar, but worth for the growl notification system]
