David Lewis offers a very insightful response to my post on the composition of Obama's cabinet. So insightful, in fact, that I want to re-post and respond here rather than the comments section.
One thing to remember here is that there arguably aren't that many progressives with resumes to easily qualify them for a top spot after 8 years of Bush and 8 years of Clinton. I suspect where you will initially see lots of progressives, if at all, will be in the White House and in the sub-cabinet. The appointments of the science advisor and the NOAA head yesterday were both progressives. You bring them in, you credential them, and then you elevate them later.
Another thing to consider here is that most of the people who have been pre-vetted are Clinton people who tended to be more moderate.
Let me just conclude by saying that I think Obama's cabinet is one incredibly impressive group of individuals. My only doubt is whether his "Dream Team" can function in such a way that most effectively pursues his agenda.