I forget if I've asked this already, but I get the impression that you can't make custom maps for Quake Live. Is there some way to do it if you put in the right amount of advertisement space? I so badly want to make maps for Quake Live...if it's not possible now, will it ever be?
Technically speaking if you make a map for Quake 3, it would work in Quake Live as well. The thing is, however, id Software would need to add your map to Quake Live and I think they only do that for special maps on special occasions.