For those of you who didn't get this on the Steam Holiday sale (I am one of those) you can now donate whatever you want directly to the developers and they will give you the game. It won't be the steam version so it won't show up in your steam games list and there will be no steam achievments, but meh...
I was very stingy and donated $2.50, but hey... it's something.
Link to the website:
Crayon Physics Deluxe
Spread the word so that these independent game developers can earn some extra cash. The more people that donate (whatever the sum) the better. I played the demo a few months ago and it is a really awesome game.
EDIT:
The offer expires January 15th.