Check this map tool, its target is the same.
java Code is accesible from cvs, you can get a working app here to see
I've tested both, and i think gametable is better but maptool has a "living" developer staff, so it will improve faster.
this comment is mine
We've tried to talk to the developers at gametable to coordinate efforts, and like you say, they aren't responsive.
In my totally biased opinion I believe maptool is technically superior to gametable :) But I'm always looking for ways to improve maptool.
What is it specifically about gametable that you feel makes it better ?