Well, lot of discussions here... :-)
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It seems you need very special hardware for the AmigaOne as it seems that the BIOS does not accept common devices and RAM. Not user-friendly I would say.
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As I see it, not so very special... but you need to know that you get the right ones. And it's not only for the AmigaOne it is in that way, it's quite common, and will for instance be the same for both Aone and Pegasos.
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As for what has been showed and yet not, it will soon be more and better information available, and also better shows... people are working on it...
As for showing AmigaOne running, this site from the Gothenburg event offer quite many picturs, and some smaller videos;
http://www.amigbg.comEnjoy :-)