As far as SPEED is concerned, there was an article in TOI in Feb 2010 regarding some Technology being tested which will give 200MBPS. Here is the article. Any update on this??
Net connection through power lines on the cards - The Times of India
its called
BPL i think. broadband over power lines.
it is being tested in some countries. this could turn out to cool as all houses have an electricity connection so it resolves the last mile connectivity.
remains to be seen if it becomes a viable technology for our market and new broadband players can collaborate with the power departments around the country to use their mmm network!
200mbit/s is frankly a bit much to hope for. 10 or less is a bit more realistic depending on the coverage area, and is comparable to what BPL providers are offering worldwide. We looked at BPL for about 10 minutes, but it turns out it's WAY too sensitive to electricity fluctuation, magnetic interference and distance (repeaters are required even more often than in xDSL). As I understand, it also caused problems with radio waves and wireless communications.
Still, in India, it could hold some promise due to the lack of wireless communications in the spectrum (FM, AM, HAM, VHF, UHF etc) that BPL usually broadcasts over (10-30MHz), and for certain coverage areas it could be ideal and it can't be ruled out completely - assuming the power companies would let anyone use their infrastructure, of course.
Even if not used for Internet access, the devices are fairly easy to get ahold of, and it isn't a bad way to wire up a home LAN if you don't want to run more cables in your house (you just need adapters for the sockets) - at these distances you're more likely to achieve between 85 and 200mbit/s depending on what devices you buy.