A new “mashup” called Vision 20/20 offers you the chance to see how many sex offenders live near you. 

A “mashup” is a combination of two softwares, systems, tools, or websites.  This particular one mashes up Windows Live Maps with publicly-available sex offender registry data.  So you enter your address and click the “Find the Sex Offenders Now” button, and you’ll get a map page that looks a lot like this:

Each of those little orange & green people on the map represents a sex offender, and their position on the map is tied to that offenders registered address. 

Go here if you’d like to run your own address through the system.