• Bay Area TYPO3 Meetup: http://www.meetup.com/Bay-Area-TYPO3/calendar/11896991/
• Facebook: http://www.facebook.com/typo3
• LinkedIn TYPO3 users group:  http://www.linkedin.com/groups?gid=70999
• LinkedIn TYPO3 experts group:  http://www.linkedin.com/groups?gid=62014
• T3Board - The TYPO3 snowboard tour: http://association.typo3.org/committees/event/t3board/
• T3CON - The TYPO3 Conference: http://association.typo3.org/committees/event/t3con/
• T3Sail - The TYPO3 Sailing Event: http://t3sail.org/faq.html
• T3Ski: http://www.snowflake.asia/en/company/events/2010/t3ski10/
• T3Con10-Dallas North American TYPO3 Conference: http://t3con10-dallas.typo3.org/home/
• TYPO3 Developer Days: http://association.typo3.org/committees/event/t3dd/
• TYPO3 News Community Posts:  http://news.typo3.org/news/community/
• TYPO3 World Map:  http://www.typo3worldmap.net/

• Editor oriented TYPO3 Video Demonstrations and Tutorials
• http://www.thedemo.ca/
• http://typo3.org/documentation/videos/tutorials-v4/
• Web Empowered Church User Community:  http://webempoweredchurch.com/support/community/

Official TYPO3 Sites:

• www.typo3.org
• TYPO3 Mailing Lists - best with a news reader, but also accessible through: http://typo3.org/community/mailing-lists/
• TYPO3 Podcasts:  http://typo3.org/podcasts/kasper
• TYPO3 IRC Chat:  http://typo3.org/community/irc-chat/
• TYPO3 Documenation: http://typo3.org/documentation/document-library/
• TYPO3 Coding Guidelines:  http://typo3.org/documentation/document-library/core-documentation/doc_core_cgl/current/
• TYPO3 Videos:  http://typo3.org/documentation/videos/wmv-format/
• TYPO3 Bug Tracker:  http://bugs.typo3.org/my_view_page.php
• TYPO3 Wiki:  http://wiki.typo3.org/index.php/Main_Page
• TYPO3 Snippets:  http://snippets.typo3.org/

Other Resources:

• http://www.typo3wizard.com
• http://www.typo3apprentice.com/
• http://www.typo3-addict.com/
• http://www.typofree.org
• TYPO3 Snippets at Snippler.com:  http://snipplr.com/all/language/typo3
• Dmitry Dulepov's blog:  http://dmitry-dulepov.com/
• Developer corner at Mediatech consulting:  http://www.mediatech.net/typo3_tutorials.html
• TYPO3 tutorials at mcuniverse.com:  http://www.mcuniverse.com/TYPO3.31.0.html
• Dawson Interactive articles:  http://www.dawsoninteractive.com/articles/
• TYPOTYCOON:  http://typotycoon.com/