If your looking for….

If you update to Leopard,
and wipe the hard disk like i did,
and you reload in all your software like i did,
Take a note of all you serial numbers before you do it.

or you could spend one night searching for the number, and not find it, like i did
then down load open office, like I did,
then pray you don’t have to open anything written in pages at work the next day, like i prayed,
then spend night two going through everything where it should be, and not find it, like i did
and then when dispair hits, like I felt it
have your wife find it randomly under a pile of stuff, like she did
in the living room on the mantel piece, “where you left it, obviously”, like i did

on second thoughts it is probably easier to note down the number before you install.