Personally, it would be nice if the RSS reader were a browser-based app, that used locally run AJAX to sync and manage feed reading right from the device. You'd get fewer additional apps to need to be used, instant browser integration, and no need to sync because you'd already be in a browser (and one of those settings would be to sync with 'x' RSS account or RSS site(s)).

Of course, do so such things would mean that the JS performance of microB (or whatever the next browser for the IT would be) would have to be much improved.

After that, I would assume that developing a widget would be just a matter of some Python play, since the data would already be there to be gleaned from the browser.