That Mystery Butterfly that I posted about earlier today turned out to be Baltimore Checkerspot (Euphydryas phaeton). I did post it on GardenWeb, and you guys were right, I got an answer almost immediately. Seems it is threatened in several areas because it only feeds on native Chelone, or turtleheads. Whew! Hearing that gave me quite the little rush.
Here it is again.
Hmmm, I wonder if I can find the turtleheads. They're quite distinctive looking.