This has been verified by the FBI (their link is also included below. Most of us take those summonses for jury duty seriously, but enough people skip out on their summons that a new and ominous kind of fraud has surfaced.

The caller claims to be a jury coordinator. If you protest that you never received a summons for jury duty the scammer asks you for your Social Securty number and date of birth so he/she can verify the information to cancel the arrest warrant. Give out any of this information and bingo your identity was just stolen.

The fraud has been reported so far in 11 states, including Oklahoma, Illinois, and Colorado. This is particularly insidious because they use intimidation over the phone to try to bully people into giving them information by pretending they are with the court system.

The FBI and the federal court system have issued nationwide alerts on their web sites.

Check it out here: http://www.fbi.gov/page2/june06/jury_scams060206.htm 
and: http://www.snopes.com/crime/fraud/juryduty/asp