I've been kicking around the idea of making an offroad kart. Kinda between a baja and a go kart. I'll post some photos when I get started. Thanks for the ideas from the site!
After watching "dust to glory" I'm kinda thinking the same thing. Maybe not a baja-worthy rig, but something fun to tear off over the hills and what not.
If you haven't seen it, "dust to glory" is a great documentary about the baja 1000. highly recommended.