Here is the published Pipe that powers my Recent News OPML feed items newest 20 with prependedon Soft Machine:
There are a few details I don’t need to go into, at the moment… One thing I will say, however, is that the aggregator pipes I looked at either didn’t work or were extremely inefficient. Others weren’t suitable, or were fragile, or very specific to a task. This Pipe is general, efficient, and quite good at producing recent items from OPML files.
The only ongoing upkeep required is to re-export my subscriptions to the cloud when I make changes I want to see reflected here!
In all, I’d say the capabilities of Yahoo Pipes are good, but you may not find what you need easily.