The trouble is there seems to be no way to get back a stolen iPhone. I lost mine on a roller coaster at Six Flags back in July. I filled out their form, and through tracking watched it move from one location to the roller coaster building. I wiped it when it didn't move to lost and found.
A month later, it showed up at a residential house. Somebody took it off-property instead of turning it in. Under the advice of a lawyer, I reported the phone stolen to the authorities.
They were uninterested.
The lawyer advised me against getting the phone back myself.