Boeing used to put out a quarterly magazine called Aero. The 3rd quarter issue in 2007 had an article about over weight landings that you can find online. They say that if you took off from a runway you can land on it and meet all performance requirements. In addition the airplane is required to be able to land with a 6 foot a second rate of descent at MTOW with no damage. They say most landings are 2-3 foot per second rate of descent there shouldn’t be any issues. There will be a requirement for an overweight landing inspection but they say it is up to the pilots to decide what the best course of action would be for the situation.