I've posted about him in a couple previous threads (that I'm too lazy to dig up). I'm a fan.
I think Vilsack's biggest asset is his personal history (because I believe that matters a lot in presidential elections). He was an orphan who was adopted and raised by a Roman Catholic family in PA. He is self-made, became a lawyer in Iowa, mayor of Mt. Pleasant, IA, and the first democrat governor in Iowa in 30 years. He is an effective speaker, generally worked well with an opposing state congress, and has very few black marks. He is also is the head of the DLC which Clinton used to become president. I think being a governor from a Midwestern state is also very helpful as the Democrats will do much better with a Midwest strategy rather than a Southern one.
I do mind, the Dude minds. This will not stand, ya know, this aggression will not stand, man. - The Dude