Laundry detergent manufacturers have done it again; doubling the potency of detergent while cutting the bottle size in half. The Wall Street Journal talks about the marketing challenge that Procter & Gamble Co. (NYSE: PG), Unilever (NYSE: UL) and their competitors are about to face. The impetus for this move is not a greener earth or a more useful product, but instead, pressure from retailers like Wal-Mart Stores Inc. (NYSE: WMT) to squeeze more product into the same shelf space. You will be able to do just as many loads with half as much detergent, and the price will be the same per bottle. The problem is getting people to realize that and, more importantly, convince them that they aren't somehow getting ripped off.

As the Journal says, "Retailers are pushing the big shrink in detergent bottles because when their shelves are full with smaller bottles, they lose fewer sales to products being out of stock and less employee time is spent replenishing product. Retailers also save on transportation costs because more of the smaller bottles can fit on a truck. Meanwhile, manufacturers, which over the past two years have been hit hard by high oil prices, save on the petroleum-based plastic packaging as well as the costs of shipping to retailers."

Wal-Mart CEO Lee Scott's strategy of promoting the products as green-friendly makes sense, given how in vogue that is right now -- less plastic, less transportation -- it actually is environmentally friendly. But there's still the emotional, less rational problem: How do you convince someone to pay the same amount for 50 ounces as they used to pay for 100? And what's more, why do the retailers and manufacturers get all the benefits?

Private equity, in my opinion, is the juiciest of all the financial sectors. While venture capital is more baldly a gamble -- after all, something like 10% of investments actually pay out handsomely -- private equity is a quieter, stuffier, much, much larger gamble. It makes my blood gurgle with excitement.

Private equity firms have been gambling big, of late, and, according to the Wall Street Journal [subscription required] at this wee hour of the morning, they might do even more so by orchestrating an LBO of Harrah's Entertainment, Inc. (NYSE:HET). Naturally, the biggie of all private equity gamblers, Texas Pacific Group, is rumored to be involved in the talks to buy out Harrah's, which has a $12.34 billion market value and $10.2 billion in debt. Now there's some leverage.

While this would certainly be the biggest casino company ever bought out by a private equity group, it wouldn't be the first casino company -- Colony Capital, also rumored to be in on discussions, has bought several properties in Atlantic City and Las Vegas -- or the first huge gamble. After all, there's HCA Inc. ($21.3 billion), in my mind (and I was analyst on many a hospital deal in my time in investment banking) a huge hospital management company like HCA is a huge gamble. In hospitals you have two very egocentric, impossible-to-predict, and money-hungry groups pulling your cash flow this way and that: doctors and the U.S. government. Ick.