This video explains why it's taken Intel so long to move away from front side bus technology.
Yes, we know AMD has been really hurting Intel's server sales mostly because of Hypertransport related infrastructure. When they did the same thing on the desktop side a few years ago Intel was reasonably quick to release Core2.
After AMD's multicore solution proved better than the competition, Intel finally fixed (sort of) their stuff as well.
But why has it taken them soooooooo long to get with the program when it comes to FSB? Watch and learn.