I have been playing around with a visualisation of RSS feeds. I began by creating a collage of logos and headings in Adobe Photoshop Elements. I was then going to create bezier curved lines with arrows. This was not possible in Elements. This is a work in progress.
Not too sure how to label semantic tools like AideRSS, Yahoo Pipes! and Dapper. They all filter and/or mix feeds. They could also be placed between the various RSS sources and the news aggregators in the centre. Then of course the RSS feeds from the news aggregators can be fed into tools like NetVibes and Pageflakes. Feeds from the aggregators could also be pumped back into blogs, and so on.
Just a start. Still have the PSD file with all the layers.