Syncany!
http://www.syncany.org/

And the best: I has more features than ALL other dropbox-like programs - also more functionality than the commercial ones!

First real release is coming soon but you can use the source already to make it.

Kate Bush did also a song about Pi, which is far better:
http://youtu.be/N-nIRHe-4HM

Sorry did not find a better version, and voice is a little muted, so look at the lyrics here:
http://www.absolutelyrics.com/lyrics/view/kate_bush/pi/

Have a good day :9

Also by Kate Bush.. Which is a great song while working :)

Isnt there a option for "extremely unfunny" that I can filter on?

Even if I got more beers in me I could not laugh at that :)

+1 from me..

I have no ads at all since months - if my open source "AdBlock Plus" for Firefox at least oversee one, I add its link with one mouse click to the other ad's!

Use Firefox, not stupid IE..
Even Opera has a AdBlocker!