I couldn't resist:
On the twelfth day of Christmas,
una_spectre sent to me...
Twelve innogens drumming
Eleven gateships piping
Ten amberflyants a-leaping
Nine sg_bettys dancing
Eight tallbints a-milking
Seven sg1dannys a-swimming
Six kdvb1s a-laying
Five 11ni-i-i-ine73s
Four eilidh17s
Three crossovers
Two stargate atlantis
...and a wicked in a pear tree.