Google's Strategic Mistake or Smart Strategic move (Motorola Buy)?

The most discussed and awaited tech news of this week: Google's $12.5 billion purchase of Motorola Mobility. There have been hundreds of post's on this topic, but most interesting and contrasting that I recommend are:

Harvard Business Review Blog:
http://blogs.hbr.org/cs/2011/08/googles_strategic_mistakes_dro.html

http://www.planonpaper.com/2011/08/16/google-buying-motorola-mobility-smart-deal-but-is-it-a-smart-strategy/

I am very curious on the Android story now :)