I looked at the MileagePlus benefits chart today and saw that it was "Effective March 3, 2012 through January 31, 2013." I'm worried about what changes will be coming. Airlines are especially bad at announcing changes in advance and program changes tend to be drastic.
United 757 at Newark
UPDATE: Massive inflation!!! There will be two award charts, one for United and one for partners. Premium cabins on partners will not be worth while. Book now while your account still has value.