Vice President-Elect Joe Biden is a well-known train geek, so we have to assume he was involved in the decision for him and President-Elect Barack Obama to arrive in Washington on Jan. 17 via Amtrak. Sure, the Lincoln-loving Obama says he’s replicating his presidential hero’s journey to Washington by starting out in Philadelphia and stopping in Baltimore on his way, but Biden made the fact that he rides the train between D.C. and Wilmington almost…