The most interesting activity on Wine with x86 emulation is QEMU. If that had existed last year then there wouldn't have been a Darwine. QEMU now has a mailing list:
What is 'fun' is that QEMU resulted from a discussion I had with its author about how to best run Wine on a non-X86 system and the resulting conclusion we reached (after some time late in the night :-) ) : the easiest and most robust way to do that was to emulate at the syscall level.
Note also this post (http://mail.gnu.org/archive/html/qemu-devel/2003-08/msg00058.html) where Fabrice agrees with my post about Wine on OS/X :-)
Lionel