Information plumbing is the idea to construct a tube system for information to flow.
In my case I aggregate several Hamburg UX blog feeds for the page "Blogs im Fluss". The key piece is the definition of the Y!Pipes. Here is a screenshot from April 2009:
And this is how it looks today:
full story on Information Plumbing, or visit Blogs im Fluss for an update of the Hamburg UX folks.