coleslaw recipes please

I have fortuitously ended up with two half-heads of cabbage* and an office cookout on Friday. I would like to make a really kick-ass coleslaw; a coleslaw with some sort of special element distinguishing it from mere run-of-the-mill cabbage drowning in mayonnaise. Anyone out there with a great recipe?

*One green, one purple, leftover from a cabbage-apple-leek soup that I have turned out not to like much.