What do I win?
An awesome-five for mentioning Penny Arcade's On the Rain-Slick Precipice of Darkness.
MapTool seems to have everything you want. I've used it before and it was fairly easy to pick up, especially with the video tutorials on the site.
I merely meant tracking elevation, so if one person is on a mound, it's obvious. Or maybe a way to alter a marker with how high that person is flying.
DOn't have beta access to roll20...nice there's a positive review!-K