I was perusing the Harmony mailing list and came across this gem, way to go Sven! The under-current of FSF/GPL "haters" lurking about the Apache community and this mailing list has always been quite disturbing. There are a few people that aren't bringing "harmony" to the F/OSS Java scene. I think the founders are doing a pretty good job at trying to herd the cats.
Assuming the licensing issues will be worked out, then there are a couple of tasks that someone with time (as in not me) could take a stab at. The first isn't that hard, not really sure why it isn't done yet other than you'd have no where to put it because it would be illegal!
- Using Apache's portable runtime, re-do all of Classpath's JNI code (which isn't that bad...) and make it work on something it doesn't now. I think all the macro stuff could go away when swapping in APR.
- GTK + native Aqua to avoid X11 or SWT "peers" for Classpath Swing?