Some clouds are light and fluffy. They are filled with data that makes companies healthy and strong.

But some clouds are dark and dangerous. "The cloud will increasingly be used for malicious purposes in 2009, as malware writers look for more efficient ways to send spam and launch attacks."

Makes sense. "[T]he cloud offers malware writers the same benefits as businesses in being easy-to-use, rent-as-you-go and highly scalable."

"In this way, it could be used by hackers for sending spam or to launch more sophisticated attacks including hosting malicious code for downloads and testing malicious code."