I was just curious to know if whether or not it was worth my time to mine with my particular setup. I'm running a Nvidia Gtx 570, however it's the chipset and i'm getting 46.6 Mhashes/s.
If you use a bitcoin mining calculator (like this one:
http://www.alloscomp.com/bitcoin/calculator), you will see that 46.6 Mh/s probably will not earn enough to pay for your electricity. At the current difficulty, you will receive about 0.03 BTC (about $2.30) per month.
Litecoin is probably your best option for longer-term mining. Take a look at this page:
http://dustcoin.com/mining.
The others that are not listed are speculative and/or pump-and-dump schemes, and are only worthwhile if you can sell them at a high price before they die (in my opinion).