I thought calico cats were at least three colors. We had a calico cat when I was a kid.
Torties and calicos come from the same gene anomaly, and have the same orange / black / white colours.. Neither are a breed, just a colour combo that appears in some breeds.
Calicos have their colours in splotches or patches, torties have theirs mixed.
http://www.freerepublic.com/~danceswithcats/
No matter what you call her, she's a beauty! Have admired her, DWC, since I first looked at your page. Is she hiding from those little monsters in the lower pic!? ;>)