I'm pretty dependent on Dropbox for work (between my Windows laptop, OS Xdesktop, and the web for access in the lab). I know dropbox isn't available for the tablets (I have an n810), but is there an alternative for syncing files automatically?

What I'd like is something that will sync files between, say, a folder on my desktop and a folder on the tablet. The best would be if it syncs whenever the tablet joins my home network, but I'd be happy with an application I can load up on either the desktop or the tablet when I need to.

Is there something out there already? I've tried things like rsync, but nothing I've found seems easy enough. I don't mind an initial setup, but I'd like it to be as simple as possible to use when I need it.