Amazon has given a free tier of their EC2 (Elastic Compute Cloud).
You get 0.6G of Ram , around 40G of Hard-drive space , and a range of operating system to play around.
This is one time offer which can be utilised to know how to configure a cloud system.
My experience so far is very pleasant with detailed documentation of configs. My cloud is up and running in less than 10 mins.
I hope every developer utilizes this opportunity to learn about cloud computing.