I'm the original writer of the blog article.I agree with you, we are missing many details about guitad board and base board. So I wrote what I think are the "safe" values, from everything I learned about it so far. For an example, before we really know what is the board real consumption, the "12v2w" seems safe considering peripherals.
You're right, my blog article is 50% copy/paste from wiki/website, because I dont have more details, and if you read the other forum post, provided software is still very limited and I could not do much more than start the board, and check almost everything works...
The gigabit edit come from a reddit member who talked about it on skype with someone at lemaker. The proof he sent to me seemed legit enough to edit the article. Technicaly, the s500 has no gigabit. So I believe the base board will provide it with a usb3-gigabit converter. I believe the base board I have is still a beta, so I don't exactly know what will be part of the final product. I've seen pictures of the same board with a IR receiver while i dont have any.
However, feel free to send me corrections, I could make mikstakes, and I would be happy to know more about this board. So far, it seems to be a really good product to me..
About nand recovery... well, I'm now on this boat. My partition resized failed and I now have a non-booting board. I didn't go too far in it right now (holidays in a remote location, I have the board but limited internet), but I can tell board is recognized by windows 7 when plugged in the usb3 mini-usb, with a regular micro usb cable, as an android device. Maybe a linux computer will let me mount and repair the partitions, i don't know. I had ubuntu installed in the nand before the disaster, I dont have any backup or image, and I'm not very interested in installing the provided android image.