Actually CPU mining is the most profitable out of all 3 category. ASIC, GPU, CPU.... of course you need to know what you should do with the CPU mining and not just mine BTC directly...
Huh?
I'm currently mining Protoshares on CPU. It's quite profitable actually.
I too am mining Protoshares with my CPU and have made decent profit. I have been mining since day one though when the difficulty was really low.
I was mining on day one and all I got was a bunch of stales and orphans... but even if those had gone through..
Where are you selling these for a decent amount? Is the price higher than the 2000PTS @0.0013BTC I quoted before? If not, I think quarkcoins are even worth more than that..