Fellow bloggers and friends:

• RPGCentric - Tony Law's gaming blog.
• D20Blonde - Liz, RPG editor extraordinaire.
• Scratch Factory - Dangerous creativity from the likes of Corey Reid.
• Jeff's Gameblog - Jeff Rients keeps it old-school.
• A Character for Every Game - Dyson Logos also blows dust off some neat stuff.
• Pen and Paper Portal - A smart, hip look at gaming.
• RoleplayingPro - These guys take their gaming seriously.
• Twenty-sided Tale - Shamus Young (DM of the Rings) has an interesting gaming/tech blog.

Communities:

• RPG Bloggers - I'm a member! Yay!
• ENWorld - Morrus's massive gaming forum, great stuff.
• CircvsMaximvs - A more everything/nothing forum populated mostly by gamers.
• The Campaign Builder's Guild - Some nice feedback.
• Story.Games - Loose and care-free gaming style discussion.

Podcasts:

• The Dragon's Landing Inn - Best gaming podcast out there, IMO.
• Open Design Podcast - Wolfgang Baur, Monte Cook, Skip Williams et al.

Other handy and useful links:

• Ventsombre - Pretty much the ULTIMATE character portrait gallery. Search is in french, unfortunately.
• DMing Advice - Thread at ENworld.
• ENnie Awards - I've palled around with these guys, they're awesome.
• The 36 Plots - Great plot arc inspiration.
• Dungeonmastering Tools - online 4e tools for the Digital Dungeon Master.
• Ray Winninger's Dungeoncraft - Comprehensive adventure and campaign advice.
• Seventh Sanctum - All the fantasy names you'd ever want to generate.
• 4th Edition fan wiki - Some interesting user-contributed stuff here.
• One Page Dungeon Contest - Hosted by the Chatty DM.
• Using a tiddlywiki to track your campaign
• A Page of Links
• Another Page of Links

Subscription Sites:

• D&D Insider - The official Dungeons & Dragons subscriber website
• Dungeon-a-Day - It just keeps getting bigger and bigger!
• Open Design - Wolfgang Baur's Donation-based Gaming Resources
• Kobold Quarterly - The new standard in D&D print magazines

Art and Cartography:

• D&D Doodle - Great drawings and artwork.
• City of Solis - Some of the nicest fan-made maps I've seen.
• Hellhound's Maps - not consolidated, but great maps throughout the thread.

Eberron Specific:

• Steal this Hook!
• Dragonshards
• Adventure Seeds
• Master Map of Khorvaire
• Grand History of Eberron
• Eberron in Ten Minutes
• Eberron Wiki (Organizations)
• List of Eberron sourcebooks

Please let me know if any of the links are broken or you would like to suggest a link worth posting, thanks!