Network World: Who's got the biggest cloud in the tech universe? Google? Pretty big, but no. Amazon? Lots and lots of servers, but not even close. Microsoft? They're just getting started.
Household names all, but their capacity pales to that of the biggest cloud on the planet, the network of computers controlled by the Conficker computer worm. Conficker controls 6.4 million computer systems in 230 countries, more than 18 million CPUs and 28 terabits per second of bandwidth, said Rodney Joffe, senior vice president and senior technologist at the infrastructure services firm Neustar.
Here is a good paper on Cloud computing - information security briefing (PDF):http://www.cpni.gov.uk/Docs/cloud-computing-briefing.pdf
There's more crook stuff out than anyone would dream to imagine.
MICROSOFT - for example
Microsoft goes the way that if a Microsoft server receives mail from any other server it claims automatically SPAM. It claims that you are responsible for sending out excessive un=solicited mail and thus rejects to deliver your mail.
Ask Microsoft to provide you with proof - guess what - you will never hear from them again.
Fine move from Microsoft to force you onto a Microsoft server, that of course, if you wish to be able to communicate with the world only. But then again, who of anyone who maintains a website wouldn't like to communicate.
Bad Luck Microsoft - you forgot the ones they don't fear you and the ones you cannot buy !