Certainly an interesting way in which to increase product sales. That's got to cause some serious issues for sales people who get their checks from one company but are selling product containing chips from their primary competitor.
Good exit for Seamicro. I don't believe they stood a chance as an independent system company. For AMD, being able to integrate the seamicro fabric into their low power parts will give it an edge over Intel in the "Cloud Datacenter" space.
With Intel buying the Infiniband unit of Qlogic it appears that both these CPU vendors are looking at integrating a fabrics into their designs. Changes are afoot! It will interesting to see how this plays out.
This also validates what the ARM server guys like Calxeda/AppliedMicro are trying to do - the future innovations are outside of the CPU now.