So?
Did Simplecoin say hashkill was a live project?
Download the archive and check the last modified date of the file inside: modified 2011-09-14 20:46 (x64 version)

Doesn't Simplecoin also say "Advanced Windows & Linux (for best mining results): Download cgminer HERE"?

Mind you that the mining kernels have to be redone to accommodate the new GCN architecture. While the ancient miners should work, they won't be able to achieve high hash rates due to being optimized for VLIW4/5.