[oops, hit post by accident halfway through writing there... try again]

I don't think it's contradictory to pull when it's not something you're trying to do -- there's a difference between desperately hunting for somebody and being open to opportunities. I've never really believed in this idea that you've got to have a decent period of mourning between relationships -- and it's particularly suspect when it's the guy who dumped you who's telling you you're not allowed to pull again yet! So long as you're honest with everybody (including yourself) about how you're feeling, I don't think there's anything wrong with it. Maybe it will turn out to be a bad idea, but bad ideas aren't usually the end of the world.