RPG.NET is the place online to go if you're interested in role-playing games. It's very much an online community run with a light hand, by its users, for its users.
This means that while you will find a lot of high-quality articles, reviews, and discussion, you'll also find a lot of crap. Sturgeon's Law is very much in effect, and nothing illustrates the tragedy of the commons better than the RPG.NET fora.
Most online fans of role-playing games have a love/hate relationship with RPG.NET that is only rivaled by their relationship with dysfunctional roleplaying situations.