BYOPVR has changed owners. See this post for details.
Just a guess, but based on other pricing I'm thinking $100 to $125 more for the i7 over the i5.
The way I see it is that the lower TDP is what likely makes the prices so much higher. 45watt is pretty low for such a powerfull chip. TDP is the main reason I would go to the i7 over the i5-I'd consider the paying the premium for lower TDP in an HTPC. The article you reference is an i7 that is a $1000 extreme edition with 6 cores against a $230 quad core. I'm guessing the i5 I'm looking at will be around $200 and the i7 around $300. So what is that?... 50% more?
even though Trinity APUs will utilize the new Socket FM2. The only difference is that Socket FM1 has one extra pin (905 pins for Llano versus 904 pins for Trinity), but independent sources have already confirmed that Trinity APUs should still be compatible with older FM1 motherboards.