When will the benefits be seen?
With the MySQL 5.1 release seemingly in development/alpha/beta for an ice age (looking at the change log the first 5.1 appeared 29 November 2005) I wonder when there will be a production-ready release of code that incorporates some of Google's changes? Also to be talking about features in version 7 seems like a decade away!
But that aside, bring on the Google improvements!