Check out the site below. It has decoding info for the VIN, trim tag, engine block, RPO codes, part codes, paint codes, and protect-o-plate codes.
Camaro Decoding Help

More Decoding Sites:

http://www.thecamaro.com/Decoding/

http://www.nastyz28.com/decode.php

http://www.camaros.org/aboutcrg.shtml

This is a good write up (with pictures) on engine stamping numbers and decoding
http://chevellestuff.net/qd/engine_stamp_numbers.htm

Stay tuned, may be adding more links. And if anybody else has a bookmark that pertains to the same subject, post it up here and I can add it to the list.