Other than this awesome djembe from Toca Percission (pronounced jem-bay, by the way) that Nadia got me for my birthday:

She got me a few t-shirts too. I selected these three from ThinkGeek:

Pi By Numbers

There's no place like 127.0.0.1

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We also really wanted this one, but it was out of stock:

Come to the Dark Side

And now, thanks to Download Squad, I really want this one as well:

Balki Bartokomous T-Shirt

(*sigh*) Some day.