Linux USB: turning the power on and off?

How can I programmatically enable and disable the power to a particular USB port on Linux? Is such a thing even possible? (no — see below) Mac answers appreciated as well!

I was trying for a BOC (don’t pretend you weren’t try to get one too!) and ended up with one of these, and would like to get some use out of the thing by hooking it up to our server monitor.

update: It doesn’t seem this is possible. All of the API’s that suspend power basically tell the connected device to turn off, but power is still available on pin 1, so simple devices such as these lights can’t be directly controlled programmatically. Perhaps the hub solution mentioned will work.

Linux USB: turning the power on and off?