Yes, actually - I’ve got a tech-savvy friend who was able to compile a 64-bit OS X binary. Hopefully it all went according to plan, as well.
Download link: http://www.mediafire.com/?lj8cj0aa1ua55ay
It’s based on commit 8980898543(…), plus fixes for a few potential bugs revealed by his compiler (memory corruption and such).
If this all works as expected, I’ll see if I can talk the same friend into giving us a Mac binary for 0.5, whenever that gets released.