People dont address real issues when it comes to BPL, and quite obviously the companies making the crap are punting it with media hype.
There are real issues that quite simply, can not be addressed.
1) BPL gives off masses of RF radiation which can for starters cause interferance with alot of critical services (like the time services in US as a very powerfull example on the link I posted). This radiation also means that there are large security concerns - and no, IPsec doesnt exactly cover it.
2) It isnt cheap!
Consider firstly the upgrades that would have to be performed on ZA's power grids, these are not Eskom's concern but are a national asset in 80% of the suburbs run by the municipality.
The equipment used isnt cheap either, and you need it every place that there is a transformer.
3) Its supposed to be supplied to hosues? Thats a bit of a problem since the domestic power grid does *not* not not not NOT NOT not not NOT not NOT not NOT! belong to Eskom or even run by Eskom. It belongs to the municipality as said above.
4) BPL is a hack solution, with many problems and extremely limited bandwidth when compared to far cheaper, and far more flexible products.
Really, I'm not going to say that the SNO or anyone should go out of their way to deliver broadband to remote locations when the people there have no economic demand. You speak with your wallet, and its a simple matter of business. The government should start with developing rural areas if thats what they want, in a free market business will then filter in there to offer services.
Wireless is a better, cheaper and easier to roll out technology for low bandwith long-haul links.