There are some refurbished docking stations out there -- specifically
a Targus ACP45US for $20.
Any idea if this would work with the BB Rev C4? Seems like it works
fine on the NSLU2 "Slug":
http://www.nslu2-linux.org/wiki/Peripherals/USBDockingStations
Looks like the Targus ACP45US has a good chance of working.
It has an ASIX AX88772A USB-to-Ethernet adapter and a previous
BeagleBoard'er noted that it worked for him in a different
configuration:
http://groups.google.com/group/beagleboard/msg/79faea1bedd928d9
I'll report back here when I get it in-house.