Here is a group of patterns for two colored quilts. You have to subscribe, I think, but I just unsubscribed after a few weeks.
http://www.fonsandporter.com/landing/lp-two-color.html
I also have a two colored quilt that might interest you. It is pretty simple....9 patch blocks and rail fence blocks, set on point. Let me see i I can find a picture of it.
Dina