XML-RPC as webservice using good MVC

[eluser]kylehase[/eluser]
I'm looking for the "right" way to develop a webservice using good MVC practices. My webservice will be a pretty standard XML-RPC service using the CI XML-RPC libraries but my question is about how to implement this in MVC.

For instance, I read that an RSS feed should be able to utilize all the same controllers as your main site but simply use different view classes. Shouldn't this also be the case for an XML-RPC webservice? All the examples seem to include model and view in one class.