"Location & Privacy; from OMG! to WTF?"; presented on March 12th. 2010 at WhereCamp EU 2010 at wallacespace King's Cross in London.
This is a recapped version of a talk of the same name I gave at Embedded Connectivity in January 2010 (http://www.slideshare.net/vicchi/location-privacy-from-omg-to-wtf)
Clipping is a handy way to collect important slides you want to go back to later.