Hope you get your camera back. More so the pictures and memories on there.
I good idea with any digital camera or video, etc is to simply write some like "If you find this camera please return to..... Or at least post the sd card to......." Then take a photo of that so it is stored on the SD Card. You may not get the camera back but at least you will have your pics.
And of course, always copy and back up your camera on a regular basis.