I explain in the OP about the Protoss logo. It's actually one of the decal rewards in the game. The decals are suitable without much tweaking, and were the original art I had for all three races. But since I upgraded the Zerg and Terran I do plan on playing around with the regular Protoss logo this weekend to see if I can get it to work well in the restricted, 1-color format.
I'm toss myself, so I do take it seriously! The decal was the best of the original three, so I think it's a suitable backup, but I will try to get the real logo to work.