Consuming a Portable Area is the same in ASP.NET MVC 2 projects as it is in Web Forms. Because it builds on the ASP.NET MVC runtime, a portable area can easily be used in any ASP.NET application
Download an example Web Forms application consuming the LoginPortableArea, which is in MvcContrib MVC2 branch: http://mvccontrib.codeplex.com/Release/ProjectReleases.aspx?ReleaseId=35865#DownloadId=92800