A: 

I know this is not related to yahoo pipes, but if you are looking for etl tools, i found yahoo pipes very limiting. I have had the best luck with Open Kapow. Just in case you have not heard about/used it.

Javed Ahamed
+1  A: 

Hey Kevin,

This post at the Yahoo Pipes blog goes through the basics of building a complex RSS feed with a couple examples.

http://blog.pipes.yahoo.net/2009/06/10/new-create-rss-and-rss-item-builder-modules/

Adam