To be frank, I don't know a lot about him. Here's what I've been looking at to get an idea of what he is like.
Novak column that blames Geithner for the Bear Stearns bailout
Wall Street Journal roundup of recent Geithner quotes on the economy.
New York Times 2007 profile on Geithner
WaPo story about Geithner's working relationship with Paulson, Bernanke