There are pros and cons to any technology. Despite the security concerns, big enterprises and small businesses alike are getting into it because of its usability, access and cost effectiveness.
By the way, there is free seminar in Seoul by Amazon on cloud computing if you happen to be there in June:
http://www.leadgenome.com/aws/apac-seminars/seoul/
By the way, there is free seminar in Seoul by Amazon on cloud computing if you happen to be there in June:
http://www.leadgenome.com/aws/apac-seminars/seoul/
