Hey DiabloD3, great piece of software, thank you! Running great on Slackware 13.37 with an NVidia GTX 260.
I noticed you said you had the same card. I am running with -w 64 -f 240 and get on average ~40-45kh/s.
Can you suggest any better configuration having played with your own card? Which driver are you using?
Also, can anyone suggest a tool to monitor / benchmark the hash rate?

Thanks in advance =)