Tracking Shoes
From: Technology Review - Jan/Feb-2012

Alzheimer's patients can sometimes wander away and become disoriented. For
patients at risk of getting lost, these shoes have a built-in GPS receiver
and a data transmitter in the sole (indicated in red in the photo on
webpage), allowing the wearer’s location to be tracked. The shoes are charged
via a USB connection in the heel. 

Product: Aetrex GPS shoe
Cost: $300
Availability: Now
Source: http://www.aetrex.com

Read the article at:
http://www.technologyreview.com/tomarket/26737/