I don't have a notebook, and only use one E6750 @ 3Ghz machine whish is used for gaming, work and multimedia.
Up until I bought Bad Company 2, I wansn't pallning to upgrade until sandy bridge comes along. Now though, since GTA IV and Bad Company 2 need quad cores, I was thinking of getting some $200 band aid upgrade, but when I think about it some more, I guess I'll wait until Sandy Bridge.
The money should be better spend on travelling and other hobbies.
Plus Intel wants about $220 or so for a Q9550! AMD sells an X6 CPU for that price, also you can get an i7 920 for $180 at micro center! - so I'm not buying the Q9550 for that sole principle.
I wish I had an AM2/3 motherboard and not a LGA775 one :/