It's interesting to see peoples hash rates with various chips and designs. It would be nice if there were a place to centrally note them for easy comparison.
None of the ones I've noticed so far has been anything to challenge GPU speed/cost. And I'm thinking as a chip only cost versus GPU not the dev kit cost.
If we could find one FPGA chip that gets a good speed to cost ratio that may be worth building a board around. It would be a winner. So far the chips alone seem too costly for the hash rates to be worthwhile, and power costs would have to become much more significant to make them viable.