Since Quake Live is on the way, I decided to try using gtkradiant 1.5. I really like the editor so far, but need to learn some key aspects; such as sun usage, water, and modifying the intensity of textures lights.
My goal is to pick people up who want to make some small tourney style dm maps implementing custom textures.
If your interested about getting into this contact me, and I'll add you to the project.