Code for America's Twitter avatar flag

Abhi Nemani of Code For America says:
Codeamerirr-1 We just put together a little site for Independence Day that we're pretty excited about. The site aggregates twitter avatars from users who tweet about #July4 and beautifully mashes them up into a mosaic representation of the stars and stripes–again representing the diversity and unity of the original flag.
Tweets and Stripes from Code for America