That's one thing that's great about AMD, they keep the same socket size around much longer than Intel..which means less money out of your wallet for upgrades.
While I agree that AMD has historically offered better socket compatibility than Intel, the 990FX is getting pretty long in the tooth. I wish we had much hope of seeing AMD release more high-end processors to compete with Intel farther down the road.
I'm really excited to see a possible new architecture next year. AMD could really pull their technology together for some amazing results. This is an awesome processor and I love AMD for its cost vs performance.