The 2010 cloud computing winner (opens in new tab)

EC2/S3 and Azure is in a different league than AppEngine. AppEngine is more similar to Heroku. If you use AppEngine to compare with EC2/S3, then we have another Google lemon adding to an already long list such as Orkut, Waves etc

I'm actually impressed with Azure's figures. Those seem to be pretty good numbers for being one of the younger platforms.