T5M.com have posted the trailer for The Last Airbender with Jackson Rathbone:

With the disheartening news, rather, lack thereof, of Eclipse spoilers, Jacksper fans can at least delight in the trailer and new promotional photos of the upcoming film, The Last Airbender, featuring Jackson Rathbone.
From the official Facebook site, the plot outline:

Air, Water, Earth, Fire. Four nations tied by destiny when the Fire Nation launches a brutal war against the others. A century has passed with no hope in sight to change the path of this destruction. Caught between combat and courage, Aang (Noah Ringer) discovers he is the lone Avatar with the power to manipulate all four elements. Aang teams with Katara (Nicola Peltz), a Waterbender, and her brother, Sokka (Jackson Rathbone), to restore balance to their war-torn world. Based on the hugely successful Nickelodeon animated TV series, the live-action feature film “The Last Airbender” is the opening chapter in Aang’s struggle to survive.

While the official opening date for the movie is July 10, 2010, The Last Airbender is slated for release in the U.K. on August 13, 2010.