So I'm sure lots of you already know about this, but in case you don't (I didn't!) - there's an *easy* way to run Windows plugins under Linux: pipelight.

See all the details at http://pipelight.net/ .

YMMV, but it finally lets me run Unity3D plugins on Ubuntu.

(One note: it requires NSAPI support, so it won't work in Google Chrome v36+)