The website is
desperate for updates. A few ideas I'd possibly recommend:
Regular news updates: News should ideally be posted every 2-3 days, the month of July got a total of 2 news postings. Nobody is going to visit a site which rarely gets updated.
Developer blogs: To show the playerbase whats going on with future developments of Planetarion. It might encourage more development to be done, as well as showing people if anything is being done. It really should show the life of a member of Planetarion staff.
Overhaul all content pages: Any content pages should have a consistent look across them. The manual should also be a part of the main site, at the moment everything it split up quite badly.
One other thing which is needed is a decent design, just take a look at some of the previous versions of the portals from archive.org -
http://web.archive.org/web/*/http://...anetarion.com/ and
http://web.archive.org/web/*/http://...anetarion.com/. Most of them are awful and unappealing. If any new site is to be used then it needs to have a professionally done and near perfect design, instead of the awful homepage look which most volunteers manage to produce every time.