I have just returned from holidays and luckily my camera was not stolen, but if it was, I would have checked out http://www.stolencamerafinder.com which allows you to enter the serial number of the camera (so go and write it down right now) and the website will trawl the web looking for photographs that have the same information (exif data) stored within them.
There is a great article in the Age Newspaper about the website and success stories.
