Rumor has it that MySpace competitor Facebook has been looking to sell out and allegedly turned down a $750 million buyout offer. Management’s supposed asking price? $2 billion.

Meanwhile video-sharing site Grouper just sold to Sony for $65 million — about $70 per user.

All this makes News Corp’s purchase of MySpace parent Intermix, at a paltry $580 million, seem like a real bargain — and reminds us of the late ’90s rush to invest in anything .com.

So is this interest in social networking sites a sign of a healthy boom? Or a fragile bubble? Tell us what you think.

A generation of promising future leaders now in their late 20s to early 40s find themselves stuck, unable to move up because the pathways to advancement are blocked by 77 million Baby Boomers.

Sure, the oldest Boomers turn 60 this year, so they may retire soon – but the youngest are only 42, which means that plenty of Generation Xers face a long wait until their next promotion. (Read the story from Fortune.)

If you’re a thirtysomething employee, have you ever bumped your head on the Gray Ceiling? What, if anything, did you do about it? And let’s hear from Boomers, too. Any thoughts for the youngsters coming up behind you who want your job now?

New Orleans, geographers say, has a great situation but no site. It is located right by the mouth of the Mississippi River, the nation’s biggest waterway, and right by the center of the country’s biggest petrochemical complex — thousands of oil and gas platforms and scores of refineries and chemical plants.

There’s an obvious economic and political need for a city there, except nature didn’t give us any place to put it.

Now New Orleans has been largely wrecked by a hurricane, though most of the damage, the Army of Corps of Engineers now concedes, was due to its own mistakes — the levees weren’t overwhelmed by Katrina, but simply collapsed before a storm of a strength they were supposed to be able to withstand.

How can we rebuild this impossible but necessary city faster and smarter? Who should take up the financial burden? What lessons can we learn so that the nation and the region doesn’t have to go through this again? –Charles C. Mann

(Read an excerpt from “The long, strange resurrection of New Orleans.”)

AMD, the number two microprocessor maker in the world, says it has been the victim of unfair tactics by an unscrupulous monopoly. So it’s striking back with an epic antitrust lawsuit designed to be Intel’s Worst Nightmare. (Read the Story)

How strong do you think AMD’s case will turn out to be? Is Intel playing fair in the chip wars? — Roger Parloff, Fortune senior editor