I haven't heard of any price drops, but I also don't expect to see any big price drops. The reason I say this is that 65nm C2 was more expensive than 45nm just a few months after 45nm was released, reason being a lot of people needed a new motherboard to support 45nm processors so they paid a premium for the 65nm so they didn't need to replace a motherboard. Currently the older Athlon X2 processors from AMD are selling for more than the Athlon II X2 processors, despite being much slower, once again the reason would be that some people would rather just buy a new Athlon X2 than replace their motherboard to purchase the Athlon II X2.
My theory is there will be no big price cuts on Core2 because of the many people who still want to upgrade their existing system. They'll loose out on price/performance of the processor, but they'll save a boat load of money by not getting a new motherboard and ram.