PowerInbox Runs Facebook, Twitter & Groupon Inside EmailPowerInbox Runs Facebook, Twitter & Groupon Inside Email At launch, PowerInbox includes email applications for Facebook, Twitter and Groupon. Each app brings it with it the ability to view and engage with site content from inside the email message. "Email hasn't really changed in its last 40 years of existence," PowerInbox founder and CEO Matt Thazhmon tells Mashable. "Looking ten years in the fut
