I'm excited to see Google take a bite out of MS Office, but I was bummed to see that Google Apps didn't support Safari. However that all changed with the public beta of Safari 3. Hmmm ... Office-like tools through Safari 3, and perhaps also through my iPhone. Nothing to do but switch to Safari 3, load some Google Apps such as Docs and Spreadsheets, and start working.
[robg adds: According to what I've read on the net, the browser on the iPhone is presently based on Safari 2, not 3. I would think this may change once Safari 3 leaves beta this fall.]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20070613112059618