Reports come from WebmasterWorld that the "Big Daddy" Google update is now complete. The Big Daddy infrastructure rollout has been completely migrated to all of Google's data centers. We expected this would happen soon, and it did. There are still some supplemental issues, people are complaining about, however.
The Big Daddy update is coined as a "infrastructure" change in the Google index. It is a core change to how Google handles certain types of pages and how it stores them, I believe. The rankings and indexing of pages can be affected, and many are.
Forum discussion on the roll out at WebmasterWorld.