Thanks to a few recent commits by AJ (and several commits over the past months by others), wine now builds on Cygwin.
Not everything works, of course, but still a neat exercise in recursion.
I've put a screenshot of wine's notepad running on XP on bugzilla (http://bugs.winehq.org/show_bug.cgi?id=21181) see: http://bugs2.winehq.org/attachment.cgi?id=28896