Sayeth the index card:
"Überfetus-
We hope your summer improves!
And, feel free to share
with your roommate come fall.
Serenity now! Pow!"
My first thought: Yay, presents!
My second thought: Wait a minute, could this be some kind of diabolical mind-control plot involving brainwashing Everything's Best Users subliminally, with the ultimate goal of wresting power and XP from their rightful hands?!?
My third thought: Nah.
I've only given my home address to two noders, but handwriting comparison seems to rule those two out. Basic deduction seems to indicate an certain pig-tailed disc jockey as likely culprit, however...