Not that he doesn't deserve it, but I've been suspicious for some time that Geithner will take the fall to shield some of the more high profile people involved in our current mess. While focusing on an entirely different story, there's a quote in this article from Politico which seems to indicate things are headed that way.
Here's the key quote:
"And press secretary Robert Gibbs said a key theme of 2010 will be asking voters 'whether the people they have in Washington are on the side of protecting the big banks, whether they’re on the side of protecting the big oil companies, whether they’re on the side of protecting insurance companies or whether they’re on the people’s side.'"
Those kinds of statements don't bode well for a guy with Tim Geithner's history.
EDIT: I just noticed that Obama's State of the Union address was just scheduled for January 27th. This is the same day that Geithner was asked to testify in front of Congress regarding his role in the AIG/Goldman Sachs debacle. It's also the day of a press-event by Apple, which is expected to announce a brand new tablet device, the new iPhone OS and who knows what else. Lots of news that day.