"meta feeds" bookmark collection

• Ruby Cookbook: 11.16 A Simple Feed Aggregator
• Wicked Cool Ruby Scripts: #13 RSS Parsing
• Spidering Hacks: Hack #69 – Aggregating RSS and Posting Changes (in Perl)
• Perl and XML: Chapter 9 RSS, SOAP, and Other XML Applications
• Perl Cookbook: Chapter 22 XML: Reading and Writing RSS Files
• "Webbots, Spiders, and Screen Scrapers (2nd ed.)" (in PHP) by Michael Schrenk, Chapter 12
• …