It's official. WOW! I knew all the signs were pointing to this, but this is a MAJOR change in the grid.
It's interesting to note that Mercedes also signed the Concorde agreement - which means they will be in F1 for the long term. That's probably what motivated Hamilton to switch teams. That, and Mercedes probably have a great set up for next year.
http://www.jamesallenonf1.com/2012/0...-for-mercedes/