Victor put together some pretty nice AVR tutorials, worth a bookmark if you’re just learning about AVR microcontrollers – Link.
AVR servo control – Link.
AVR based digital compass – Link.
AVR based RPM meter for cars – Link.
AVR Blue Sky projects – Link.
AVR controlled clock – Link.
ELM – AVR based radio spectrum monitor – Link.
Getting started with 8 bit AVR microcontrollers – Link.
Getting started with AVR microprocessors on the cheap – Link.
More AVR! – Link.