A guy working on his RPG tools cranked this guy out. I've not used it, but it looks cool
Hex-based mapping :)
http://hextml.playest.net
You should ask bbmike about Mapit, does a lot more really simply, but this also looks like fun
What's mapit ? Can I download it somewhere ?
(Yes, I'm the guy who made Hextml, the internet is tracking you! Be afraid!)