FBI is now probably the first Law Enforcement agency in the world to directly seek help from bloggers and website owners to track Predators, Missing Persons and Most Wanted Persons. This link to the FBI website shows the 4 different modules you can incorporate into your webpage to help nab a criminal.
Although the modules use [iframe] and cannot be called 'Widgets' as-such, it's still nice to see a government agency trying to use current technology to help a good cause.
If you have space available on your webpage and you haven't decided on what to do with it, give the FBI widgets a go. Who knows, you might even be able to win the reward set on one of the most-wanted people!