• ReefKeeping.com and forums
• Melev'sReef.com
• Tonmo forums and cephcare pages
• AdvancedAquarist.com
• reefs.org forums and other good stuff
• TheReefTank.com forums
• WetWebMedia.com
• AquaLinkWebForum.com forums

Newbie Resources

• reefs.org
• advancedaquarist.com
• nano-reef.com
• Mything the point, part 1, part 2, and part 3, and a good slide