Tracking a thief via Sircam

How the worm turns: Slashdot posts a somewhat interesting reader submission that seeks help with finding a stolen computer infected with the Sircam virus. The reader asks: “Any way to track this guy via email, or even an ip or something
stored in the virus code itself? And if I do find him, do I send the cops, or just my
6-foot-4, 260-lb ex-eastern-block buddy Radek?”