The Nokia E55 is Nokia's thinnest ever Eseries device (9.9 mm), but still manages to pack in a lot of functionality. It has a 20 key - half QWERTY keyboard (two letters per key), a 3.2 megapixel camera, an integrated GPS (with compass) and a 1500 mAh battery. There's also tri-band 3G (HSDPA and HSUPA) and WiFi connectivity, 35 mm audio jack and ehanced messaging software.
You can also view this gallery on Flickr here.
You can view more information about the Nokia E55 here.