The Amarna Project is the official website for the archaeological excavations and research currently ongoing at the Amarna location. This website has a great deal of information about the city, the excavations throughout history and the overall ideas and history relating to Akhenaten and Amarna.
The Egypt Exploration Society has a long history of association with excavations at Amarna. The society began in 1892 and supported the early UK expeditions to the site. The EES have published extensively on the work done at Amarna.