ASIC's are far too big of an investment for many people to make, at least at this time, when FPGA mining is just starting to take off.
Search for LargeCoin on this forum. May or may not be legit, but it appears someone has bit the bullet already.
Asics (and to a lesser extend, s-asics) have been the prime reason I have not committed to FPGAs. At least GPUs I can resell to gamers, but its gonna be tough reselling your 80W BFL single's if asic based products really hit the market.
Largecoin was confirmed by ttul to be s-asic, if I remember correctly.