Pictures of the hardware
It runs off a 12V 3.33A Power supply.
It looks like it might be possible to add a second network interface with a few parts and some soldering. Stay tuned! There is an internal USB-port that it's possible to use. Look at InternalUSBPort. There is already a serial port header on the board. Look at SerialConsole for more info and how to use it.
It appears that there is a space for a Mini PCI socket. It is unknown at this time whether it is possible to enable it.
The pads for connecting a JTAG adapter are present on the PCB and are marked JTAG & J1. If you have a DS-101 containing a M-Systems DiskOnChip flash then you may have trouble reprogramming it with the freely available tools such as JTAG Tools.
(confirmed working, but with complications. see DS101Jtag for details)
1 VCC 2 nTRST 3 TDI 4 TMS 5 TCK 6 GND 7 TDO 8 NC (not connected)