UA have just announced they are changing IAH-EZE from Continental 767's to United 767's. The Continental planes on the route now do not have lie flat beds. And UA's 767's have seating plans both with and without lie flats. As I'm flying that route in January I am anxious to know if the new planes mean I'll get a bed.
http://airlineroute.net/2012/08/04/ua-iaheze-w12/