From the Mario Piano site, where you'll find "authentic, high-fidelity Mario sheet music that was entirely faithful to the original Mario themes and sound effects, and which could be trusted to be 100% accurate," the sheet music for the Mario "coin" sound.
Read more in Music at Boing Boing
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.