OK, there are some definite display bugs, most notably the power selection pane is behind the background (thus you can't see the powers, but can mouse over them).
Built it today. Runs and loads a forum post build, but not tested beyond that. Because it is wine, it is big (~200M zipped and ~500M as an .app). Most of the size is because of dotnet 2.0 used in Mids', so that can't be helped.
I built a wine wrapper today for current Mids' (1.953 issue 21). Because it is wine, it is pretty big (200M download and 500M unzipped), but it seems to work.