They take a much needed step past existing server log analyzers. Not only are the statistics much more readily available (and real time), but they also provide very granular data on exactly the areas bloggers care about – things like comments, trackbacks, links in and out, etc. The conversation aspect of blogs.
Anyway, Measure Map is evolving and stats are erratic this weekend. I realized just how much I’ve grown to rely on it when it wasn’t fully available to me.
Kevin Hale has a list of additional analytics services here.