This picture has been taken at IDF2009 (Pekin) and it shows Pat Gelsinger with a wafer of Larrabee. From this picture, some numbers can be extracted: Larrabee die’s surface is around 600mm2 (almost the same surface than NVIDIA’s GT200).
The big size of the die might mean Intel will use a 45nm fabricaton process and not the new 32nm. Number of cores: 48 cores in 45nm ? Or 64 cores in 32nm ? Pat Gelsinger claims Intel will launch the first Larrabee based graphics card at the end of 2009 or early 2010.