At any rate, Bigdaddy is a long term conversion, changing over a new data center approximately once every 10 days. It will probably mean a lot of changes in Google SERPs as sites move up and down in the new indexing process.
On that subject, the comments on his post make interesting reading, as well. In amongst the bad puns and other jokes on "Big Daddy", there’s a lot of complaining about the results of the new indexing.
People just need to realize that search engine changes take a long time to implement! As the billions of pages in the index are re-appraised some will rise and others will fall – if Bigdaddy causes your rank to fall, all you need to do is wait. Assuming you have a well optimized page using ethical strategies it will eventually come back up!