Several things come to mind… Set it up as a webserver? How much power does it consume, and how suitable would it be to act as a webserver?
Replace those expensive wireless USB hubs (plus more power…)! could you access the usb devices through the wifi? (printers, webcams and more don’t take too much bandwidth…)
could you have add-on hard drives? Flash drives? this seems like a very interesting thing that could becomes very powerful…