I did not work on NNTP integration for forums.
Now they are freezed until, nukes core finished.
We still need a forum, the forums on jboss will
be refactored to fit in nukes.
NNTP integration might be considered later.
I'm not sure this will help solve your problem, but there is file uploading code that might help out. Maybe you have already seen it. The web site is http://www.servlets.com/cos/index.html . It's from one of the O'Reilly books. I use the upload.war file contained in the downloadable cos-date.zip file to do file uploading to my servers. It's worked well for me. The zip file contains the source code too.
there is no need of oreally file upload since commons-fileupload works well. The problem is the nukes code. I've fix the problem passing the HttpRequest encoding to the FileItem.getString().
Since I think this is a nukes bug. I'll submit it soon.