I've seen a device demonstration - however i already said Silverthorne can be understood as a physical die and as a feature-set. I have also seen a package with a small die, but not the die in the device demonstrated. If you did, i'd appreciate a pointer.
Call it paranoid if you want. If so, it's just following Andy Grove's advise how to look at things.
Having said this, i don't claim the small dies won't ever go into production, there could be even working devices already. I just have neither seen this nor is it relevant for my understanding of Penryn's DFM.
K.