Google+ Project: It’s Social, It’s Bold, It’s Fun, And It Looks Good
Thing's I noticed trying out the demo:- You can only have add a person to one "circle". If I wanted to add someone to two or more, I'm SOL. Maybe they will change this.- A "circle" can only contain a certain number of users before it runs out of room.  I haven't seen how it deal with this - does it shrink the circles as you add more? What happens if there are 500 people in one, would they be a bunch of 1 x 1 pixel dots? Or does the circle just say "You can't add any more people"?