Perhaps I'm not part of the target demographic for this, but I don't really grok it.

It seems like (a very well executed) yet-another-photo-sharing app, with an extra layer of marketing fluff.

I see the founders are in the thread so maybe they can clarify - what's the main difference between this and say, just using Tweetie to share pics? Do you really think there's a need to make a distinction between say "all twitter followers" and "my real friends"? If I take a picture of something funny/cute/awesome, don't I just want to share it with as many people as possible?