RPG United
Searchable product database with reviews for various systems. Also allows search by Author or Producer.
http://www.rpgunited.com/

The Ogmios Project
Information and resources for game masters and players.
http://www.ogmiosproject.org

RPG News
Roleplaying News. Also features Interviews, fan sites and company spotlights.
http://www.rpgnews.com/

OpenRoleplaying.org
Open Gaming community featuring discussions, interactive stories, tools, articles, and news.
http://www.openroleplaying.org/

How do u D3?
An online survey on how gamers determine the result of a D3.
http://grabjobs.net/d3/d3.asp

RPG Host
Large resource site, includes roleplaying archives, site and product reviews, newsletter, contests, forums, postcard and dice servers, extendable interactive stories, player listings, several online and PBeM games and worlds, Fellowship free site hosting.
http://www.rpghost.com/

Gaming Outpost
Daily gaming news, reviews and articles. Hobby gaming search engine and online forums. Special promotions and contests.
http://www.gamingoutpost.com/

Roleplay Forums Online
Forum and community for roleplaying related content. Includes play-by-post RPGs and downloads.
http://sphinxwebportal.homelinux.com/forum/

RPG Resource
Dedicated to supporting and enhancing roleplaying campaigns by providing company and product lists with reviews, links, and general resources.
http://www.rpg-resource.org.uk/

RPG World
Community resource site for players.
http://rpgworld.ath.cx