Well, this “Cloud” thing is all over the place. If you want to give it a try without spending money or using a credit card then the Microsoft Windows Azure Community offer is worth a closer look.
Just select your country and enter “COMMUNITY” as promotional code.
The trial is limited to 90 days, but this should be enough for getting a feeling if the are any benefits for you in the cloud.
Hop you will have some fun in the sky!