Wow! I combined the Great American Afghan and Great American Aran Afghan, and finally, after two years, completed 30 squares - it's really big. Blocking took a really long time - some of them were much smaller than they should have been, and some were at quite a rakish angle.
I spent last night basting the squares together, and will begin the actual sewing today. They actually seemed to fit together pretty well when basted, so I'm hopeful the afghan will look as it should. Of course, the border will probably take another month or so, but it would be really cool if I could give myself the afghan for Christmas.