Invite Media
A Philadelphia based tech startup that seems to be focused on providing a better way to display online advertising.
They are currently funded by First Round Capital.
From their website:
Invite Media is currently in stealth mode. What we can tell you is that we are working with some of the top statistical minds to analyze and optimize online display advertising, with a social network twist. We are funded and located in Philadelphia, Pennsylvania. Our founding team is from The Wharton School of the University of Pennsylvania (and won the 2007 Wharton Venture Award). We have a strong group of advisors, and are always looking for the smartest and most passionate people we can find.
Philadelphia, PA 19103 United States

