ATD Invades Groupon's Chicago HQ (Video)

Last week, my partner-in-crime-and-bloggery, Walt Mossberg, and I were in Chicago for a Wall Street Journal event, so we took the opportunity to visit the global HQ of Groupon there.

The social buying company has been going like gangbusters over the last year, both in terms of valuation and growth.

Nelly Furtado Leeann Tweeden Bali Rodriguez Izabella Miko Cameron Diaz