Thanks for the update Karl. Skydrive has come out since it was written so I'll add it now, and a caveat about some touchpads.
On four of my machines I use Skydrive to Sync Any Folder to Your SkyDrive Account.
It's working well although I notice a few apps downloads missing on each machine sync'd. I may try rooting User folders in Skydrive which has been suggested on their blog to use instead of the symlinks.