They’re not Microsoft
They innovate
People watch everything they do
They’re cool amongst da people
Despite being cool, they’re quite secretive (no Google blogs apart from an official one… no Apple blogs at all)
They don’t speculate on their products until they launch them, catching their opposition by surprise
I’d love to think of some more, but I’m late for dinner.
There is a Google Blog: http://www.mattcutts.com/blog/