I'm new to this (just saw the write-up on lifehacker), and curious if this would be profitable. I did a test run on my q6600 using only two cores and got 2269 khash/s. Now at .14 kWh and a 450W ps I got .008391698 as my magic number. Now assuming my math was right (.000233*2.269)/(.45*.14) I should just forget it.

My questions are:
1. Did I get the math right?
2. Would using a mining program vs bitcoin make a difference?
3. Would using a mining program on my 9400GT card make it worthwhile?

Thanks for the help.