How do I get my (lost) device's serial number from its UDID?
I found one way.

I am an iOS developer, and I once used this iPad for development. Xcode has an Organizer window, which keeps tracks of the devices I used for development. The iPad appears on the list, and it also displays the serial number.

This of course only works if you have developed with the device using Xcode. I wonder if there is a more standard way to get the serial number.