And now, how about collecting a good hefty bounty for a working effective GPU miner? I'd put down up to 1000 DRK - not much but if many people donate it'll build up.
If more people are interested I could work on GPU miner for a bounty. I already have something more or less working (pools are accepting shares, also solo-mined one block this night with it), but it's still very slow (nearly 2 MH/s on Radeon R9 290). Unfortunately I can't promise it will get much faster, still working on possible optimizations.