t4ct1c47, AMD hasn't had an FSB for years, we're still overclocking just fine. You're still altering the bus speed that gets multiplied to determine the CPU clock, it's just a different bus with a different design, construction and name.
However, the internal CPU bus is seperate from the bus that is used to communicate with the memory and I/O devices. For example, a stock Athlon X2 may operate at 200Mhz and yet the Hypertransport link between the CPU and internal devices runs at 2000Mhz. Intel plans to combine these two bus's together and that is why the CPU bus has to fall in line with the new main system bus.