AVR

The manufacturer! - http://www.atmel.com/products/avr/default.asp?source=cms&category_id=163&family_id=607&source=global_nav/

ProjectProto - http://projectproto.blogspot.com/search/label/Atmel%20mcu/

VE3LNY's AVR projects - http://www.qsl.net/ve3lny/avrdesign.html

Lots of information! - http://www.mikrocontroller.net/articles/AVR

The homepage of Peter Fleury - http://homepage.hispeed.ch/peterfleury/

Nice project site - http://www.avrprojects.net/

Atmel AVR Projects - http://www.xs4all.nl/~dicks/avr/index.html

Cornell University projects - http://people.ece.cornell.edu/land/courses/ece4760/FinalProjects/

Jesper's AVR pages. - http://www.myplace.nu/avr/