The idea uses tiny, widely spaced tiny circuit elements embedded within a stretchy polymer and connected with wires that "popped up" as the polymer was stretched.

BBC: Stretchy battery drawn to three times its size

Seth Grodin, who uses SixApart's Typepad blogging application to produce a widely read marketing blog, says he was "annoyed and upset" by the downtime.

FORBES: Blackout On The Web

The FTC also uses the database to spot new problems before they spread more widely, he added.

WSJ: Consumers Cry Foul Over Debt Collectors

Sprint relies on widely available technology for its system, while Nextel uses proprietary technology from Motorola (nyse: MOT - news - people ).

FORBES: Now, How Do They Plug It In?

But it uses a lot of battery power, and the 2.4 GHz spectrum is also widely in use by devices like Wi-Fi networks--and cordless phones and microwave ovens can cause interference in that range.

FORBES: Magazine Article

Its Mirage masks are widely considered the most comfortable on the market, so Farrell's sales force uses them as a come-on.

FORBES: No Rest for the Weary

Another clean technology, which uses synthetic gas to produce electricity, appears promising, but it is expensive for now and not widely available.

FORBES: TXU Has Competitors

The cost of building a custom home varies widely, depending on the region of the country and the finishes and materials the owner uses.

WSJ: Top Architects Go Local

Most of the tricks Yahoo uses to keep visitors on its site e-mail, chat, stock portfolios have been widely copied.

CNN: Net stocks come bouncing back