thanks, trying to catch up on where this ecosystem is at now?
The short and sweet of it is... A bunch of us have been doing this privately for the past year or so on leased machines. We were using private tools and private bitstreams. It became public knowledge with another developer making a long post about it. That allowed / forced us to go public about and we started trying to put something together that would allow everyone to benefit. We've managed to negotiate a good deal for access to chips from Xilinx and now we're trying to rapidly develop the ecosystem surrounding the cards so all of the software tools, support structure, etc is there. We've released a bunch of our private code that we've been using (urls below) and we're working on developing more professional software and tools (aka stable / well written) tools for community use.
https://github.com/sense-it/rtlhttps://github.com/sprocket-fpga/FPGA_Mining_AWShttps://github.com/sense-it/fpgaminer