Hi David,
That is interesting news.
I've been out of the loop for the past few months with a busy automation PLC /SCADA job, and am happy to be slowly getting back to where I was.
I have been looking at the situation of small Linux SBC's lately and and trying to make a decision of what to use if I move away from the Cubieboard.
I have not used a beagle board, though I have read about the BBB revC and from Element14.
I just don't seem to be able to move downward toward the Pi family, although some of the other Pi could be tasty

Then I looked at ORDOID, and after lots of other looking I get overwhelmed by choices.
Anyhow I have rejuvenated my Cubieboard II with what appears to be a well supported Linux/GNU distribution, Armbian, which was a total breeze to install and has the Cubie working with mainline kernel.
So, you have an Arduino Nano talking to the Classic and then passing that data via I2C back to the BBB, sounds good.
Is there any reason not to just use the BBB to talk directly to the Classic ?
Windows, don't talk to me about Windows, man, I'm playing around with digital radio DRM with a cheap Chinese Handie-Talkie and feel so discouraged by a wasted day.
Our local amateur radio club has a Classic install at the top of the mountain I'm on as part of our multiple repeater installation and I'm sort of getting ideas of wanting to be able to connect into it to get and log data, other than via the local app.
I had thoughts of your nice implementation using a DUE.
I'm interested in your ideas for the XML/JSON and AJAX part of it too, as I am just this week getting my head back into my Modbus SCADA system, Quadlog.
I'm seeing code in their that I just don't remember doing, like using the jansson library for HTTP. Surely I should remember what I code I wrote, it is even commented by me, gosh, is this a sign.
Anyhow David, keep up the work and keep posting, I find it very interesting what you are doing.
Paul - VK7KPA