Forum Nokia is a sister site of maemo.org that makes up the third part of the Maemo spectrum. Users go to maemo.nokia.com, community types go to maemo.org, and developers (primarily commercial) go to Maemo @ Forum Nokia. This isn't advertising (what, exactly, are they selling?).
Internet Tablet Talk has been dropped, it's now Talk. The "front page" you're looking for is talk.maemo.org.