InDesign Help - Support, Troubleshooting, Tutorials, and News about Adobe InDesign. - http://indesignhelp.com
InDesign Scripting Reference - Use this online reference for programming Adobe InDesign software. Choose either AppleScript, JavaScript, or VBScript. - http://www.indesignscriptingreference.com
InDesignSecrets.com - Developed by David Blatner and Anne-Marie Concepcion. Provides articles, podcasts and videocast from various contributors. - http://indesignsecrets.com/
InDesign CS2 Advantage Center - Articles, tutorials and tips provided by Layers magazine. - http://www.layersmagazine.com/indesign.html
Adobe InDesign - Tips and tricks on a variety of topics (PDF). - http://www.adobeevangelists.com/indesign/06_indesign.html
InDesign User Group - Provides information about upcoming user group meetings, news and professional opinions about the industry, and learning tips about the software. - http://www.indesignusergroup.com/