Image by Fareastgizmos.comImage by 20081122-gps.gif While another component to relay the tracking information is needed (think: small cell phone), GPS tracking devices themselves have become super-small.
Mark Tirico was picked up by police a short while after he allegedly robbed a downtown Bank of America. The quick bust was thanks largely to the bank having inserted a "mystery" tracking device into the stolen cash.
The paper stops short of saying what technology was used to foil the robbery, but it seems reasonable to assume it was some sort of GPS device. With the recent generation of the device being super-small and easily hid amongst a thick wad of cash, I had wondered why they weren't used more often in bank robberies.