At certain mhz you have some gain with Gulftown.
It stopped at about 4200mhz with the 6800GS.
With 9800GX2 it was about 4800Mhz.
It's all in the card clocks and soldering skills
Seems like the server is slow, uploaded some score's yesterday, no points for it.
I see it in my personal page, but no rankings.
http://hwbot.org/submission/2189459_