We had a camera stolen from us some years back while en route to Freiburg from Basel on a late train. It’ll be interesting to see whether this is any good to us —
The site reads EXIF info from one of your own digital photos and then trolls the Web looking for other images with the same info.
ETA: it won’t help us — the camera we lost was an older Sony that doesn’t record serial number info in the EXIF. Oh well.