This is the great video I couldn't remember - but it was VERY helpful in showing all the different dies and how to use them with a Cuttlebug. Clear, informative, and interesting!
Debbie - hope this is helpful! (It certainly gave me the push to run out and grab lots of the big Sizzix dies when I saw them on clearance!) Ok, so I didn't need THAT much of a push...!
http://www.youtube.com/watch?v=Q2EPWdNm8B0&feature=player_embedded#
Her blog is called My Life's Art - also helpful and interesting.