Shawn Blanc:

Imagine if you will what a merging of Dropbox and MobileMe might look like. Something simple and completely expected, I suppose. It would be free, it would sync and share info and files, and it would let other apps use it for syncing. Imagine setting up your iPhone with your Apple ID once, and then any app that has a Mac and/or iPad counterpart would sync. Sounds like mobile bliss.

Agreed. Shawn offers a great analysis of what iOS users really need from MobileMe and Dropbox – I agree with everything he says (except I DO use the MobileMe galleries feature, so I must be one of the few).