Run a Mathematica program in a cluster

Suppose I want to r开发者_如何学Goun a Mathematica program that I wrote, in a cluster or using a cloud computing solution. Can Mathematica programs run on their own without a license? And in case they don't, do cloud-computing solutions come packaged with the resources to do it?

I think you may be interested in gridMathematica: http://www.wolfram.com/products/gridmathematica/

David

It's also worthwhile pointing out http://www.nimbisservices.com/catalog/cloud-services-mathematica who offer cloud computing services using V7.