The "Big Daddy" data center that was Discovered at 188.8.131.52 mid to early December has now migrated over to the main SERPs. Matt Cutts followed up a couple days later with a number of blog entries listed below;
- url canonicalization
- interpreting inurl
- discussing 302 redirects
- Feedback on Bigdaddy data center
- Bigdaddy on the move
All these post contain an incredible amount of information about this new non-update, "infrastructure" change. The forums (as well as Matt's blog) is spewing with feedback on this update, let me give you a break down of links to the forum threads;
I am sure we will more of this topic soon.