These are the source code and binary provided to me by Butterfly Labs.
I have not (yet) reviewed or audited the code myself.

8826dcab9ef4a212197e961598e2e9ec4221e24717b09e1c3e488c3ff6454f73  BitForce_SC-1.2.6.hex
9e288514a01a7f6246f866b16f234031ce04436504f3e48b305a84b14e4efe3f  BitForce_SC-1.2.6.tbz2
ff7f52a44072e16781683a2d47e7762f6c00e25b808afe4c7becfbc5ff0c8ec3  BitForce_SC-1.2.6.zip