Over the years I've come to know John Katsaros and Peter Christy of the Internet Research Group pretty well. They are two really good marketing guys who spend a lot of time digging into new emerging areas and understanding what's going on.
I've mentioned their book "Getting it right the first time" in one of my earlier posts - its a good place to start when you are thinking about launching a new idea. John and Peter have a methodology that helps nail down the issues early on with a great deal of focus.
I was delighted to find that both John and Peter had started blogging - you can find the front end to both of their blogs here - well worth adding to your reading list.