REST on IIS
I think part of the reason for the lack of buzz around REST on the IIS stack has been Microsoft's original adoption of SOAP as the way, truth and light when it came to web services - especially with Windows Communication Foundation being heavily SOAP focused.
They went on to release the WCF REST Starter Kit, to follow on from the release of .NET 3.5, and also the ADO.NET data services that are part of .NET 3.5 SP1.
As Magnus points out, Microsoft have since released the ASP.NET Web API which builds on the features of the ASP.NET MVC platform to provide a unified approach to RESTful services on IIS.
ASP.NET Web API is a framework that makes it easy to build HTTP services that reach a broad range of clients, including browsers and mobile devices. ASP.NET Web API is an ideal platform for building RESTful applications on the .NET Framework.
I'm involved in a project that uses WCF REST on IIS, but of course I'd recommend having a look at the framework I built: OpenRasta is a .net open-source stack that makes implementing REST much easier.
Google is your friend. The main site is http://trac.caffeine-it.com/openrasta.
The WCF Rest Toolkit mentioned in the answer from "Zhaph - Ben Duguid" is now deprecated.
It has now been replaced with the WCF Web API project.
Edit: Which is now also deprecated and replaced by ASP.NET Web API!