I still run a socket 939 based PC so you have one up on me.
I have no plans to upgrade soon because it's plenty fast enough for me.
I'm not a big gamer except an occasional driving game. It runs them just fine.
I do have a couple of Raptors in RAID 0 so it's not slow by all means.
Once the AM2+ quad cores hit a true 3.0ghz each core, I might be inclined to upgrade.