Ramjac, a British DJ, has produced a mashup of the whole Beatles catalogue. Ramjac's mix, "All Together Now," layers every single Beatles song atop one another, in reverse order of length, so that for the first few seconds, all you hear is "Revolution 9" (the longest song in the songbook), then "Hey Jude" atop it, and "She's So Heavy," and then more and more, until it crashes all together at the last note, with 226 tracks all colliding.
It's more conceptually interesting than musically enjoyable. Hank Handy's 40-track Beatles mashup is a better choice if that's what you're after.
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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.