Screwed by a Honda Dealer

I just leased a Honda Odyssey, but I think I got screwed royally.  What can one do at this point?  It's obviously not a lemon, so I can't invoke the Lemon Law.  Anybody have a suggestion?  I know I should have been better prepared, but combination of the salesman's smoothtalking, eagerness of my wife and son, and my non-existant shopping skills were just too potent.  Argh.  What bothers me the most is having to look at a blatant reminder of getting screwed every single day for the next four years.