I don't think anything is going to come along to save it. The creator of the site, Xavier Werquin, has explained today on the FNA forum why the site can not be continued - unless someone other than him is prepared to run it personally and at a loss.
Here's his post - in French.
It's very sad, as NAV2000 was an excellent site.
Xavier's CV is posted on
www.nav2000.com if anyone is looking for a very talented multi-lingual entrepreneur for any reason.