In the continued interest of those working with POX (Plain Old XML over Http), here’s an article in the Windows SDK “Beta” documentation on how to read RSS via WCF, with code.
Beware that the link may change as the SDK get’s to RTM, but if you search the SDK documentation for the text “RSS WCF POX” you should come up with the link/code.
Consuming RSS From a WCF service using POX encoding and a WPF Client.