I've reimplemented Dave's RSS rendering for mobile devices by writing about the simplest RSS renderer possible. It's at: 
http://tools.opiumfield.com/rssriver/ 
Just load that URL with a feed URL on the end, like this. 
And you've got yourself a mobile-friendly, one shot river showing the latest stories. I wrote it simply because I want a way of showing an RSS feed that I read better on my Palm. 
Next, I want to write a PHP OPML renderer. If anyone can point me to any good caching libraries for data that PHP is pulling in, I'd love to know about it. 

