Pretty crazy stuff! I look at the megan's law website once a year and have then cross referenced the names with that link to confirm who was in my neighborhood. Now I really know who to keep an eye. The freaky thing is, one of the convicted child molestors walks a 3 legged dog around the neighborhood. My little girls know who not to talk to and who's dog not to pet. Scary stuff!
On a lighter note, I now know the names of all those neighbors that I only briefly talked to.
I'm not personally concerned about it, but those that need to maintain some level of security (high profile/net worth individuals, former victims of violent crime) now have their name and home phone number out there. Theoretically bad guys could use the second link, find your address and now they have your home phone number.