DSM-G600, DNS-3xx and NSA-220 Hack Forum

I have only recently run across the DSM-G600 as a hackable platform (started on http://dns323.kood.org/dsmg600/). After reading through that wiki and searching around a bit I find that I have a couple of questions based upon a possibly faulty observation:

From studying the pictures of the DSM-G600's main board (the PowerPC version) it occurs to me that this board looks more like an OEM embedded platform rather than a custom job by D-Link. Poking around on the FCC's website and searching for the board ID didn't turn up anything so I'm thinking that D-Link got the whole package certified instead of the individual components. So, I was wondering, has anyone been able to find out anything about the origin of the main board? Is it a D-Link custom job or, as I believe, something they purchased from a supplier of embedded boards? If the latter, any idea who?

Related to the previous question and observation; has anyone gotten a schematic (or, perhaps, contacted D-Link about how to get one)?

I create embedded linux BSPs for a living and have a board that's *very* similar to the DSM-G600's main board on my bench right now (uses the Freescale XPC860) that I'm finishing up. Knowing that board I think the DSM-G600's main board is highly hackable, both hardware and software, and could easily be made into a significant (albeit slow) platform. I'll be purchasing one this weekend so I can poke around a bit but I was thinking that if the schematic wasn't available maybe I'd just purchase two. That way I could remove all of the chips from one of the boards and trace out the schematic from the pads.

BTW: I notice a non-installed 16-pin header just off the center of the board with 7 pins connected to, apparently, the XPC8241. This looks an aweful lot like a JTAG connector; any idea if it is? It would be cool if I could just slap my emulator onto it.

Thanks both for the reading of my post as well as any information anyone can provide!