Hey I'm building an iPod dock out of the cardboard box it shipped in, I've already got it talking to the computer:

Now I have two goals. The first is to put in some small speakers to get full dock functionality, the other is to put in a usb 2.0 hub, since I'm out of ports with the iPod and my tablet plugged in, and I might as well combine the dock and hub.

So does anyone know of a good small usb2 hub that I could charge an iPod from? And since this is for a portable dock it should get power from the computer, not an AC adapter. Any help would be appreciated!
MacBook Pro Intel Core Duo 2.0ghz, 1gb ram
Dell 228WPF 22" monitor
Mybook Premium 320gb
iPod Nano 4gb (red)
Wacom Intuos3 6x11