I wonder what "confidential trade secrets" they took along with them considering that Groupon's product is more of a market risk than a tech risk and so easily cloned. I don't think that Groupon is going to win this one because the Valley's laws has very favorable towards employee mobility. Many engineers here have Google, Facebook etc on their resumes hiring is so competitive here and Groupon better get it and focus their energy on employee retention schemes instead of futile law suits.