Patterns

The Hillside Group is incorporated as an educational non-profit organization with particular interest in patterns:

http://hillside.net/patterns

Also see Mike Grand's web site at:

http://www.mindspring.com/~mgrand/

Brilliant newish book on patterns. Uses cartoons and a host of other novel techniques to explain patterns. I really like it.

Head First Design Patterns by Elisabeth Freeman, Eric Freeman, Bert Bates, Kathy Sierra, O'Reilly; 1st edition (October 1, 2004)