http://www.atcsforall.com/ - lots of examples and a place to trade with other artists from the entire country!
http://www.jerrysartarama.com/discount-art-supplies/artist-trading-cards.htm - this page provides a list of resources for where to buy ATC supplies and books!
http://www.altered-art.net/artist-trading-cards.html -Explore this site for unique examples and a list of ideas for embellishments!! Great Site for ATCs!!!
Easiest ATC Cards Ever!! - Video - A quick and easy way to prepare several cards at once!