How Big is the Cloud for Microsoft?
No, it’s not a rhetorical question, but in simple terms here are some factoids from both some internal and external services. I feel like Cliff Claven 
- 1 billion: Windows Live ID authentications each day
- 3 to 4 billion: # of emails filtered daily from >6 million mail boxes by Forefront
- 450 million: Hotmail users
- 20 million: Xbox Live users
- 700,000: Square footage of one of our new datacenters
