IPO 'mania' rips through start-up world... Groupon filed its papers to go public yesterday, leaving many wondering if Groupon is the next Google—if not the next Webvan. One thing is for sure, though. Andrew Mason, Groupon's founder, just got a whole lot richer.

...as Zynga courts Goldman. Mashable reports that investment banking behemoth Goldman Sachs has met with Mark Pincus and Zynga to lead its IPO and provide $1 billion in financing for potention acquisitions.

When you need to switch gears as an entrepreneur. Have you ever felt like you're trying to "swim in your jeans?" Barbara Taylor has. And here's how she fixed it.

The Weiner King. OPEN Forum offers this success story of John Galardi, the hot dog entrepreneur who grew his one-man-stand into 350 stores in 10 states.

The coolest use for an iPad yet? Alaska Airlines is now using tablets for flight manuals. Here's to hoping the pilot doesn't forget the charger.

Revealing your personal story is good for business. In Forbes today, J. Maureen Henderson makes the case for the fully transparent entrepreneur. Example: an exotic-dancer-turned-business-coach whose e-mail signature is "Kisses + Whippings."

Wall Street feels Friday jitters from 'dismal' job report. The Wall Street Journal notes that stocks took a tumble this morning after the jobs report "showed hiring by U.S. companies slowed dramatically in May."

Are you too old to start a company? Michael Arrington over at TechCrunch explores the "peak" age for an entrepreneur, which some venture capitalists peg at 25. What do you think? Let us know in the comments section below.