FourceLabs

http://hackronym.com/olpc/gamejam/index.html
This game design event is held this very weekend. But it could be an interesting challenge to participate in if the event is repeated in the future.

So much for Philips’s Entertaible.

http://www.konjak.org/chalk.htm

This is an arcade shooter à la Gradius, but with a cute anime character… and chalk. Draw lines to eliminate enemies or to defend your character. According to Adriaan, this works great with a sketch tablet. Download now and be addicted!