For people ever suspicious of cloud computing, this document should be an eye opener. For people open to scientific temper, this should really convince you of the potential of cloud computing .
http://s3.amazonaws.com/aws_blog/AWS_Security_Whitepaper_2008_09.pdf
For beginners , a definition to cloud computing can be viewed here.
And a good cloud computing blog is http://www.elasticvapor.com/ and a good cloud computing vendors are www.rightscale.com and www.gogrid.com , besides Amazon Web Services.
DECISION STATS 