"the NDA is [...] incorporated into the CPU supply agreement." http://amigaworld.net/modules/newbb/viewtopic.php?topic_id=31001&forum=2&start=160#546725
If this NDA really exists, I wouldn't call the secrecy childish.
> The remaining will sure suck a lot of watts.
That would mainly be the southbridge, which is rumoured to be the AMD SB600.