How many websites in the Google ad network? (adwords, adsense, display)

[Vageetasjn]

I'm finding it surprisingly hard to find good data on this. Anyone know a good source?

Also, I'm looking for a source that quantifies how much personal info is contained in the profiles they keep on everyone for targeting ads.

Thanks

 

[Vageetasjn]

Anyone? Bueller?
Looking for any interesting stats on the size of the google ad machine.