While the idea of Apple owning Dropbox makes me nervous, Shawn’s right about this:
In its current state as “exchange for the rest of us” MobileMe seems neither exciting nor ambitious. As a web-app, me.com is beautiful and extremely functional. But I for one never use it. Instead I use the native OS X apps. And iDisk? Well, that is also collecting dust.
What would be exciting is an open service that bridged the gap for all the data which is shared between our Macs, iPhones, and iPads. What could be more ambitious than killing the USB cable?