http://samy.pl/mapxss/You can enter wireless devices Mac address and find its location its pretty cool.
Of course it doesn't have every devices location.
and
#!/bin/bash
echo "MAC to Location"
echo "Enter MAC Address"
echo "Example: DE:AD:BE:EF:CA:FE or DE-AD-BE-EF-CA-FE"
echo -n "MAC: "
read mac
echo
echo \<h1\> >> results.html
echo $mac >> results.html
echo \</h1\> >> results.html
curl http://samy.pl/mapxss/?mac=$mac |grep "street" >> results.html
echo \<hr /\> >> results.html
echo
echo "Finished"
echo "If there is no location, invalid MAC or not found"
Just a little script i wrote, makes it easier since you don't have to go to site and do it yourself.
I can't think of any good uses, but its still pretty cool.
Tutorials : Hacking Scenarios 
Hadnagy : [Article]-An Insider`s Look at the Social-Engineer.Org SE CtF at DEFCON
Editor-In-Chief : Free Webcast: Don't Pick the Lock, Steal the Key - PW Auditing with Metasploit
Links to cool sites. : Ninja-Sec Challenge You !
Tools : Nmap 6 Released
