Hi

i have also been wanting to get into fpga development for ages and this bitcoin mining idea made the final push to aquiring an fpga dev board, will get get my basys2 pcb with spartan 3e 250k gate device on thursday.
ofcourse i cant put fully pipelined implementation in it as its about 3X larger than the fpga would fit but i imagine i could fit a looped implementation into it easily

so thanks for releasing the code it will be a good reference

i dont know if i'll get to the actual implementation working on it but among other projects this will certainly be one idea i'll try