RSSiCal allows you to enter a URL for an RSS content feed that can be used in iCal. From there you can then iSync it with your iPod and read the content at a later time on your iPod. The source code
is also available.
Version 0.8.3 is now using Ed Swindelles RSS Parser. Shows attirbutes for many HTML tags and now fixes issues with entities. Overall, much better formatting.
Mac OS X 10.2 or later, iCal, PHP 4.x.