I think the end of Stephen George's LEO article tells us all we need to know about the likelihood of underground powerlines. A study in NC (doesn't say how big an area would be involved) showed that burying "lines in susceptible areas [...] would cost $41 billion, take 25 years to complete, and result in a 125 percent rate increase."
At dinner last night with my parents, we discussed the "outrage" some people were having over the time it was taking for LG&E to restore power. I'm just not able to understand this outrage. I thought the restoration project was timely, effective, and well-coordinated. I also assume that the workers are/were doing the best they can/could to restore the power as quickly as possible. I don't think anyone should start throwing stones about how quickly power "should" be restored until he/she understands exactly what the process entails.
I also think it is important to distinguish between the company and the workers, as Robin has done.