http://jamesfallows...._sync_android.php
It includes some pointers to tools he uses, and talks about the issues with .PST files.
I like the idea of having access to my stuff from any networked device, but I worry about the usual things that come up with files on the Internet. It's probably also the case that if one decides to start using the cloud seriously, then one will want to move everything there. And it looks like it's easy to get locked into a particular storage vendor. The idea of keeping my financial stuff, and my various other personal stuff out there (when we all know of stories or have been affected by sites that have been cracked), is a bit too scary right now...
Cheers,
Scott.