Developer, Former MVP, now at Microsoft - Best of 2004, 2005, 2006, 2007, 2008, 2009
"... The WCF programming model support will be limited to channel layer messaging (no service model support on the device) [...][...] We'll expose all necessary extensibility points so people could plug in their own transport and layered channels, while maintaining a unified programming model. [...] The channels we plan to deliver out of the box are Http and... yes, e-mail (for WCF on desktop and device)."