osgNV users are strongly encouraged to subscribe the public mailing list, kindly hosted by SourceForge.net. The mailing list is the primary source of information and support on osgNV, it is a virtual place where osgNV users, authors and contributors can meet and exchange ideas. You can browse the mailing list archives here.
Since osgNV is an open source project and its development takes place mainly in the author's spare time, please don't expect him to answer immediately to your questions. Best efforts are always made to provide reliable support, but unfortunately spare time is never enough...
You can contact the author directly if you wish, but please give the mailing list a try before doing that. If the nature of your message makes private communication more suitable, then look at the Contact page to see how to contact the author privately.