Yes these would be absolutely perfect and i intend to use these for the next generation. The BFL chips would require a lot more development because of the flip-chip package.
Awsome news!

I think I will buy some chips via groupbuy... do you have any idea how much chips per board will needed?
Some people say 4, some people say only one and doesn't depends on maximum sockets - I think it depends on the individual pcb design - in this case, do you have any plans?
(I know you have a lot of work to do, but this is very interesting - hope also I can order my bitburner XX soon

)