Several years ago I used Win4lin, which often worked well.
It would be useful to have something like this on the n900,
but not with the intention of having the entire desktop envirionment.
Only as a way to run certain apps. Something like having easy Debian
but not actaully using the LDXE. One would make desktop shortcuts
to run, say, word or power point from Win4lin, as opposed to the open
office applications in Debian. I guess this is the point of using Wine in the
first place! Anyways, I don't really know enough about how to do this and
maybe you run into the same problems with the processors mentioned
earlier in this thread. But it would be nice if it worked!