Gone to meet its maker
Before further regurgitating whichever desperate powerline vendor's marketing puff is really behind this, you might want to ask Scottish+Southern Electric how they're doing with their "full commercial rollout" of powerline in the UK (starting in a couple of Scottish towns, and Winchester, back in 2003 iirc). SSE Telecom even used to be leading members of the PowerLine Forum www.plcforum.com around that time (check the wayback machine) but they're not visible anywhere in this market now. However there's still an interview with SSE's powerline spokeschief on ISPreview: http://www.ispreview.co.uk/articles/power/
Where are they now, and why? And where is the kit (which was actually on loan to SSE from the powerline vendors, according to the vendors own info, hmmm).
If Verizon (?) are making FTTH economically practical in the US, what hope is there for the economics of PLC in those same areas?