I think that’s an excellent attempt to make the license a little more reasonable. A lot of people use Movable Type to generate side-bars, such as linkblogs, photoblogs, or other content. They will now be able to use a personal license.
I would also like to see how they performed the survey of 2500 bloggers. I hope that it wasn’t a self selecting group, which is a no-no in trying to do surveys.