hold on.  you're running 18 graphic cards?  can I ask, what setup do you have?  I've read once you put more than 2 cards in a computer you lose a lot of performance so do you have like 9 computers you're running?  also, if that's the case isn't your energy bill at least $500 per month - and how much money can you clear?  I checked the bitcoin calculator and even at 10GH you're only making about $40 per day.  seems like a huge investment for $800 per month profit.

Am I missing something here?  I'm looking for the most efficient way to make this work and I can't seem to find anything reasonable.  And I don't even care about mining bitcoins, I see that as a boat that sailed away, I would like to at least be able to mine other coins like namecoin or litecoin, devcoins, etc.

Any advice would be appreciated.  TIA