What companies will benefit from cloud computing and server virtualization?

Specifically, I'm looking for equity investments. Which companies are currently in the BEST position to profit the most from this trend for cloud computing and virtualization? I know 2. I want to hear other's opinions.What companies will benefit from cloud computing and server virtualization?
TIBX

RAX

RHT

SKYY (ETF for all Cloud Computing stocks)

http://seekingalpha.com/article/278857-t鈥?/a>

http://www.marketwatch.com/investing/fun鈥?/a>What companies will benefit from cloud computing and server virtualization?
I have done research on a software project Using Cloud Computing. Which includes most common parts of a company's Management system. What i realized is Cloud Computing will give a vast break through in E-Commerce. We already have Cloud Computing based Popular sites, Google, Amazon, yahoo, e-bay, etc. even Facebook.



In our Software we shall cover Inventory Management, Employee Management etc.