I was curious and visited http://www.familywatchdog.us/ to see if there were any people registered in my area. I know I wasn't the only one who decided to check it out at that very moment because the site was unavailable due to the overwhelming amount of traffic to the site. The site had exceeded its capacity to handle all of the requests at once.
I checked it again today and I was able to access the site. It was slow and sometimes the maps didn't display, but I'm sure that's because of the amount of traffic the site is still experiencing.
I was patient and I found out that there is a person who has been registered as having an offense against children, living within half a mile from my niece's elementary school.
I encourage you to check out Family Watchdog and see if there are any registered sex offenders in your area or in your family's area. It's a good idea to know this information so you can protect your children.