I've been trying to use Yahoo Pipes to create new streams from my Google Reader feeds.
I've run into a parsing problem (Pipes may not support parsing feeds that require cookies) and a limitation of Pipes' Boolean logic (All A not In B).
I both cases "hapdaniel" answered my questions, though my problems are not yet solved.
Which led me to look at all messages by hapdaniel.
I've looked at the Pipes documentation. This message stream is more useful.
There's a lesson here, that I'm slowly learning. Whenever you receive a useful response on a message board, you ought to mine all related messages. Most forums allow one to see all messages of a member, almost all allow one to search for a string. These are valuable information streams.
So who is hapdaniel? A hobbyist with deep technical knowledge? A Pipes developer moonlighting in the forums? A covert tech support person? I think we see all 3 in these settings.
In some cases, it might be worth adding these information streams to a Google Custom Search engine.