What is behind all thoes lovely google apps and services

Love how google does things, I don't know why, but it just works.

Google’s three rules by ZDNet's Robin Harris -- They roll out new applications for millions of users with surprising speed, especially compared to corporate IT. They build data centers with hundreds of thousands of servers - and millions of disk drives - and run it all on free software. Costly corporate kit, like RAID arrays and 15k FC drives, aren’t used. Yet they [...]