Department of World Justice: Non-system specific campaign set in the near future. Includes characters, organizations, and players.
Heroplay.com: Characters, articles, and a player registry for multiple gaming rules.
The 20' By 20' Room: Best Supers System?: Discussion of what the best superhero roleplaying game system is.
The All-New All-Different Howling Curmudgeons: You can be the hero: A history of superhero roleplaying games told from a player's perspective, along with discussion and comments from others.
The Central Nexus: Descriptions of and characters for multiple systems. Includes DragonCon convention pictures and commentary.