Intel has revealed a lot more about Larrabee since then. If you are interested in GPGPU, you might want to check out the paper Intel presented at SIGGRAPH : "Larrabee: A Many-Core x86 Architecture for Visual Computing"
http://www.siggraph.org/s2008/attendees/program/item/?type=p...
As a person currently working with both CUDA and the AMD Stream SDK, I am pretty excited about Larrabee. If nothing else, I hope Intel will simply provide better documentation and perhaps better software tools :|