BPL has the green light from the FCC. The NewsFactor has an article that goes into more detail. I have to agree with the conclusions the author makes--BPL is not likely to be a major factor for rural communities. Like DSL and cable modems, you have to have a critical mass of customers to justify the expense of the equipment. And it is not significantly less expensive to install than DSL or cable, so it won't have a big price advantage.
It may make a difference in some communities, but communities will have to continue to do the hard work of market creation through content and service offerings via a community network project, and ongoing training and education programs.
Like DSL and cable, BPL is another technology that potentially lets a single public or private company capture the entire broadband marketplace (unless the community makes some transport layer infrastructure investments to level the playing field). Once a single company has captured the marketplace, the community's economic future is now at the mercy of that company. Is that what you want?