Thanks for the info. I think I'll look for a new USB 3.0 hub.

>USB 3 changes that somewhat - high- and low-speed operations can run simultaneously: http://en.wikipedia.org/wiki/USB_3.0#Architecture_and_features
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>As for pass-through ports, depending on the type they may not be electrical at all. For example, a VGA device could plug into the VGA port using special screws that can't be easily removed. A lock would be attached to the device, thereby securing the computer. The device itself would just have to lead the VGA pins out to a new, offset connector. It wouldn't need to use any electrical power or signalling from the VGA port.
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>http://targus.com/ca/drivers_manuals_archive.asp?SKU=PA492C