Are Liberal Blogs In Decline?

Some big ones do seem to be trending down in traffic. And the right-wing ones seem to have had a buoyant end of 2007. One thought: is the intellectual ferment among conservatives more engrossing right now? There are fewer internal liberal battles as ferocious as those now raging on the right. The Dish, for what it's worth, just had a record year. Am I in line with conservative blogs? Or an outlier for liberal ones? Or sui generis?