Groupon sales plunged 30% in February and another 32% in March, according to James Moran, cofounder of Yipit.com, which tracks daily-deal companies and aggregates their deals into one e-mail for its own mailing list.

FORBES: Groupon Fights To Keep Its Lead

Moran credits his success to his affiliation with CoderDojo, co-founded by fellow Irishman James Whelton and Australian entrepreneur Bill Liao.

CNN: Coder club turns out tween tech prodigies