based on the huge difficulty jump today.... I think someone has succeeded in fpga/asic bitcoin flooding 
*bell ring*
We have a winner!
Two FPGA clusters went live.
You have about 300 chips doing 200 MHash/s? That's 60 GHash/s you brought online? While that probably puts you in as one of the top miners, that's not a significant cause for the recent network growth.
For someone without piles of existing fpgas sitting around idle: If purchased new, that's $250k in hardware costs bringing in $10k per week in bitcoin value. Half a year to pay off the initial investment (assuming price/difficulty growth remains steady). GPUs would break even in less than half that time.