i have written a stand alone WCF REST service in 4.0 under Studio 2010 but i decided to host it under Azure as opposed to Amazon AWS. Is there an easy way for me to convert it or what do i need to do so it runs under Azure's web role? I created a blank web role project in Studio but the structure of the WCF seems totally different.
You shouldn't have to do anything special to get your service on Azure. Depending on how you do your WCF service, you can just add it as a cloud role. If you want to see an example of a WCF service used in Azure you can download our Windows Phone 7 Guidance that has a WCF 4 REST service hooked for a Windows Phone 7 project. You can the chapter about that here. You can get the code here and check out the service.