I found a pre-compiled binary of Wine for Intel Macs. It looks like they didn’t fix the problem in context_i386.c that I ran into, they just worked around it:
[mike: 7]$ winecfg
wine: Unhandled page fault on write access to 0x00000000 at address 0xffff0857 (thread 0009), starting debugger…
FIXME : get_thread_context_ptrace unimplemented
FIXME : get_thread_context_ptrace unimplemented
Can’t attach process 8: error 5
wine: Unhandled page fault on write access to 0x00000000 at address 0xffff0857 (thread 0009), starting debugger…
FIXME : get_thread_context_ptrace unimplemented
FIXME : get_thread_context_ptrace unimplemented
Can’t attach process 8: error 5