Thank you all for the answers! I also had doubts about the overheating stuff (did also some reading through complaints) but the failing power supply also looks like a major show-stopper. Actually I was thinking about such boxes just as a comfortable 5W NAS/torrent server (activities which do not tax the cpu till the point of overheating, even if it looks like that overheating came from NICs...).
About the porting side, well... the pile-o-dung bugginess is unfortunately true about such devices... but still, if they run run some kinda linux, there might be hope... it looks like a matter on the pure terms of "luck".... Maybe it's just about waiting or.... modding the plug with some aluminium to dissipate heat... even if some metal radiator near 220V circuits (who btw might also lack grounding) doesn't sound much "sexy"... :((((
