AVR-Chat

You already have a Butterfly and Butterfly Carrier.

Joe Pardue of Smiley Micros
http://www.smileymicros.com/
is big on the Butterfly as a AVR learning platform. He has written a book, "C Programming for Microcontrollers" selling for $45,
http://www.smileymicros.com/index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=26
that is a training course on using AVRs, using the Butterfly.

He has a $99 hardware project kit
http://www.smileymicros.com/index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=26

Smiley also is a regular contribuator on AVRFreaks,
www.avrfreaks.net

By the time you go through the book you should be well versed in programming AVRs with the C language.

From what I got out of the "Atmel AVR C Training Course & Dev. Board" sight the software CD is copy protected. Any company that does not trust me, I don't trust them.

Mike