mcrandello@dorkstar:~$ lsusb -v

snip
  iManufacturer           1 Microsoft
  iProduct                2 Zune
  iSerial                 3 d8dbbd07-eeac-4e66-80bd-1ff88ee00652
 <snip>

mcrandello@dorkstar:~$ mtp-detect
libmtp version: 0.2.1
<snip>
   Serial number: 07bddbd8 - acee664e - 80bd1ff8 - 8ee00652