Retailers sniffing cell phone Wi-Fi signals at the mall... and future uses.

Technology that allows retailers to track the movement of shoppers by harvesting Wi-Fi signals within their stores is spreading rapidly. 

Giant U.S. retailers including Nordstrom and Home Depot are already using it, as does one of the most popular malls in Singapore. Indeed, Euclid Analytics, one of the better-known companies selling the technology, boasts that it has tracked some 50 million devices in 4,000 locations. (more)

Also, check out Y-Find and TheRetailHQ.

So who cares if Home Depot knows what aisle you are in?

Think ahead...

"We are excited to be working with YFind to help them realize their vision of creating Location-Intelligent cities..." Pete Bonee, Partner at Innosight Ventures

Cities!?!?  
WTF? 
Oh, right. 
The government marketplace is huge, worldwide even.