So far this is no-contest: MeasureMap wins the blog analytics “war” in a walk. The specialized tools at MeasureMap, while far from perfect, are much more useful to bloggers than are the general purpose analytics out of Google/Urchin. (Whether that matters, of course, is a totally different question.)
As the data mining people like to say, context is king, and MeasureMap understands that it is parsing blog data. Meanwhile Google Analytics, for all of its puissance, doesn’t know the difference between a blog and a site about the Burns Bog. The future is in understanding context and intention.