This seems useful. Hopefully they don't take too long coming out with the Google Plus API, I predict there will be a lot of thirdparty addons/interfaces like we

This seems useful. Hopefully they don't take too long coming out with the Google Plus API, I predict there will be a lot of thirdparty addons/interfaces like we saw with Twitter. I'd like to be able to use circles as venn diagrams and perform more sophisticated unions/intersections/differences/joins on my circles as well as generate them on the fly for one-use purposes.