We’ve all watched Facebook slowly recover from its disastrous IPO. Now another company seems to be back on the rise after taking a public beating. From Wired: Groupon returns from the edge of oblivion. Meanwhile, Zynga will need a Grouponesque turnaround (and then some) to climb back from its current lows. From Ars Technica: How Zynga went from social gaming powerhouse to has-been.