I'll be making the editor in either C++ or C#, though for now (almost) all of the utility functions are up and running in a test C++ console app I made.
As for the tetris map, since you said you weren't finishing yours, and I got impatient (it's a cool idea for starcraft, I think), I started on one of my own. It's not like yours though, as the inspiration I got for it goes to a royally kick-ass game called Tetrinet I played a while ago, which I suggest you try out sometime (multiplayer tetris with a dispicable twist
). I'll send you a copy of the map once I get the major outlines of all the features and stuff completed, bolt, if your interested, since it was your idea to begin with.
(yes I know it was originally a blizzard map as well)