This will be a really big deal if it works, and small-scale field tests seem promising. (The quality of the video below is lousy, but it gives you the idea.) The most intriguing thing about Square, though, at least so far, is the conceptual leap that Dorsey may have been uniquely qualified to make: Payment transactions are a kind of social interchange.

FORBES: The future is Square

The New York City Council on Wednesday passed a resolution urging the state to halt unpaid field tests for third- through eighth-graders scheduled to begin next month.

WSJ: Test Maker Pays New York State Students to Take a Trial Exam

One of the most outspoken critics of means-tests is Frank Field, Ms Harman's respected deputy at the social-security department.

ECONOMIST: Welfare benefits

Dr Paul Jenkins, consultant endocrinologist and clinical director of Genetic Health - a UK company offering a variety of tests - said it was an evolving field.

BBC: RELATED BBC SITES

Nest's field tests indicate that customers generally accept the adjustments -- 80% of those beta-testing Seasonal Savings hewed to the newly adjusted schedule.

CNN: Nest's plan to stop brownouts before they start

In tests last year at Yankee Stadium and Citi Field, MLB experimented with the Hawk-Eye animation system that is used to judge line calls in tennis and the TrackMan radar software used by the PGA Tour.

WSJ: MLB hoping for large replay expansion in 2014

The first Google Wallet field tests are focused in New York and San Francisco, where many retailers, Coca-Cola vending machines and even taxis are PayPass-enabled, including major outlets such as CVS, Jack in the Box, Sports Authority and Sunoco.

ENGADGET: Google Wallet mobile payment service, Google Offers announced

According to a new report from RootMetrics (a company which conducts its own field tests of wireless networks), Verizon Wireless currently offers the nation's fastest 4G -- by far.

CNN: Report: Verizon offers nation's fastest 4G service