Hey there,
Like I said, I haven't received all the parts yet so I haven't begun the adventure (or nightmare).
I will however follow-up and tell you what works (or doesn't).
In regards to DVI switching, what exactly do you mean? The GTX280 is going to be purely used for Bootcamp to meet my gaming need and will be hooked into another port of my 3008WFP. I do wish I could use it for OS X, but alas I will wait for Snow Leopard...
...and hope. EFI notwithstanding, of course.
- Stan