We've got a new dual Xeon at work, and the case has an array of 4-pin fans (the new PWM style ones, like this, some pictures here). The motherboard has enough 4-pin headers, but they're out of reach.
On page 4, there is an "IDE Power" connector. It looks a lot like a 4 pin CPU fan connector, but it (obviously) provides different voltages that are appropriate for 3.5" IDE drives (5V, 12V) and the ...