RESTful intermediaries for mail, RSS?

The Kindle browser works much better with RESTful sites as opposed to AJAXian Web 2.0-y pages. To be more specific, the Kindle browser doesn't work well at all with AJAXian Web 2.0-y pages.

So this leads me to look for RESTful intermediaries / proxies for the two most useful network functions: email and RSS feeds. Doesn't anyone know of such libraries / services?