Shocked no one mentioned, I'm sure you know, GPUs are getting pushed out this year. I dunno, I was looking at the difficulty charts and bitcoin.sepa.be is predicting some scary stuff for 2013 that started in late 2012. I'm guessing it's ASICs coming on line so it won't stop, if anything it's only going to accelerate.

I'm having a hard time deciding which ASIC rigs are worth it if any, it's getting difficult to see the point of running GPU mining for anything but novelty. I'm thinking in terms of breaking even on your investment and turning a profit relative to electricity costs. Of course I could be mistaken...