Funny how the sketch/doodle 'artistic direction' seems very popular these days amongst the geek set. Along with SketchFighter there is the excellent LineRider
I can't find the link, but I know that Steve (my friend who worked on the excellent Toblo game I blogged about a while ago) also did a SketchFighter beat-em-up platformer while at Digipen. I'll see if I can dig up the link.
Update: Steve dropped by and left the link to his sketch-aesthetic game in the comments to this post. It is called PaperChase and you can find it here.