Joe Johnston published a “How To Hexcrawl” PDF geared toward Labrynth Lord. I read part of it and he mentioned me in the acknowledgements. This is not the first RPG product that I have been involved in, just the first one published. How cool is that?
You really should go out and get this, for no other reason, than I helped! Also it is PWYW, so you can get it for free and tip him later.
It is a quick and simple introduction to hex crawls and he lists resources for free existing hex maps, three sources/programs for creating your own hex maps, and the hexcrawl articles on Welshpiper, Bat in the Attic, and The Alexandrian.