I reside in one of the third-world countries and I've been thinking of a way to enhance e-learning, starting with my college. We've been looking at various options (Wi-Fi, WMax and broadband over power lines) and  BPL seems to be the option of choice, especially considering state of infrastructure and technological advancement. Would appreciate your comment, help and any resource you could make available. 
- Via the Internet

BPL is certainly an option to consider. The concern I've heard from the areas that have gone through performance trials prior to starting actual implementation is the interference that can potentially be caused by carrying the Internet signal across the power lines. Essentially the power lines - while being used as a transmission method for the Internet signal - can act like a big antenna, radiating the signal in the area where the power lines are. This can have an impact on amateur radio operators in the area, as well as other communications in the 30-Mhz area and below. Interference is possible in the VHF spectrum running between 140 and 180 Mhz when BPL isn't installed properly by the utility or whatever partner company they select.

Depending on the utility in your area, it may already be doing this for equipment control purposes at its substations. See if your electric company has plans to implement BPL, and you might be able to arrange to be a beta site for them and get good PR for the both of you. Performance you will get will depend in great part on the speed of the connection the utility has installed to drive things. Another speed items to factor in are your distance from the substation and the condition of the power lines connecting you to the substation. If you have access to Wi-Fi and/or WiMax as it seems that you may, it might be worth looking in to them to see comparisons of speed and cost. BPL, at least here in the U.S., is fairly new technology, so everyone is still learning how to deal with it.

In addition to the electrical service coming into your building, an extra box is placed on the power pole to extract the Internet signal back out to a connection you can deal with. Check out the United Power Line Council for more information on BPL. Again, this is targeted at US companies but should get you started in the right direction. Another source of information is Telkonet. Between these two links, you should get an idea of what questions to start asking of your power company and what information to give them if they are receptive to a potential business opportunity.