Interesting blog post on what scale Hotmail is running at.
- Storage is being added at 2’000 Terabytes per month
- Currently 155’000 Terabytes of storage is being used
- 350 million people actively use Hotmail on a monthly basis
- 3’000 million mail messages per day, of which 1’000 million are SPAM.
- Largest SQL Server 2008 deployment worldwide
Read more about it on the Inside Windows Live Blog