On the CSS Tricks blog there's a recent article showing how to combine the jQuery Javascript library and the SimplePie PHP feed aggregator to create a iPhone/mobile interface to any RSS feed.

We are going to create a web page that is formatted specifically for the iPhone (but would presumably be good for other mobile devices as well). This web page will dynamically fill itself with content from any RSS feed that you give it. The interface is going to be built to be easy to use on a mobile device, with large "touchable" areas and nice (jQuery) animations that whisk you between articles.

They work through the process - five simple steps:

• Create the iPhone Environment
• Pull in the RSS Feed
• Creating the Front Page: Headlines Only
• Creating the Article Pages: jQuery Slider Style
• Adding Some Flair

All code and images needed are included (as well as a demo if you'd like to try it out).