Because it isn't disruptive enough when a bunch of cacophonous ringtones sound off in the office at once, we present you with the Ferris Wheel Phone Stand.
Place your phone in this holder and there'll be no mistaking it when you get a call. The wheel spins, the red and green LEDs flash, and a not-so-soothing round of "Rock-a-Bye Baby" fills the air. (And your co-workers may just want to have you sacked.)
You can buy the gadget (and watch a video of it) on USB Geek. For $27, you'd think they'd include a crazy little USB clown.