Have you seen how the newest version of Mozilla Firefox supports what they call "Live Bookmarks"? These are simply RSS newsfeeds from the sites which you visit. So, why not utilize this feature on your PHPNuke website? Read this post and find out how you do it.
Note: If you're using Firefox to view this, look in the lower right hand side of your browser window for the RSS feed icon to subscribe to NukedGallery.net's newsfeed.
UPDATED:This forum post has a method on how to publish pending submissions to site admins only via RSS.
