i doh think the ethernet over power as a home solution is gonna succeed.. 802.11n offerin same rates, and the whole wireless tech is the vogue ting nowadays..(especially as more and more laptops are being sold each year)
perhaps if your house gives lousy wireless, and you doh wanna lay cable, then you might want it over power..
but other than that, i think wireless tech has much more of a mindshare that this ( powerline, homeplug) and this will always be an 'also-ran'