The BFL wait list thread has just under 50TH/s of orders. I think someone else around here claimed that Inaba (or BFL_Josh) said they were closing in on 90TH/s of preorders. The bASIC is closing in in 35TH/s of preorders. The Avalon preorders were around 18TH/s.
For my personal calculations, I'm assuming a 200TH/s network by the end of 2012, and then increasing by 20% per month after that. You can do the math to figure out the rest.
Well, if you're assuming a 200TH/s network by the end of 2012, what are you assuming the true overall networking hash rate is right now to correspond to current difficulty levels, so I can do some simple math and multiply the current difficulty to get expected profit by the end of 2012?
What? You can't figure out an estimate for the current network hashrate? I'll give you a hint: