[whpalmer4]

A couple of options:

1) use the Send Settings (via email) option on the OmniFocus Sync Preferences page. After tapping the button to send the magic message, you go read your email and tap the link you'll find therein. That launches OmniFocus on your iPhone and you just need to enter username and password for the MobileMe server. At least, that's the way it is supposed to work -- it looks like the data detector stuff might have broken it.

2) You can enter the data by hand. Tap on MobileMe right under Synchronization on the iPhone app's settings page. All you have to fill in is your MobileMe username, the path (Documents is the default), and then your MobileMe password when you first try to do a sync.