From Lunarforums memeber, Day:

I've written on these forums before about how to write a web scraper in PHP that can be hosted on a Lunarpages account.  But I recently discovered Yahoo! Pipes and the new Fetch Page module which allows you to make web scrapers in a visual way using drag and drop and a few rules.  The resulting scraper is hosted by Yahoo! so you don't need to write any PHP, figure out how to do cached HTTP requests from your Lunarpages account or schedule any cron jobs.

So I abandoned my previous PHP scripts and created a Pipe to make the RSS feeds for these forums.  I've written up how I did it in a tutorial.  The general techniques should be usable by anyone who needs to extract data from web pages without RSS feeds or other structured data sets.

Yahoo! Pipes Tutorial - An example using the Fetch Page module to make a web scraper