people who RSS this feed this also feed...

Interesting observation I made while tooling around Bloglines. In my bloglines subscriptions, which you can see on the blogroll on the left, I can click on the feed and see who is subscribing to the feed by clicking on a neat little link they have titled "subscribers". Click on it and I get a list of subscribers to the feed, then by clicking on a name I can see what subscriptions that person also has. Note that you have to do this from within Bloglines, not just by clicking on a link in the left gutter.

The point is that I can see what else subscribers to a particular feed are reading, it's just like the Amazon 'people who bought this also bought this other thing' feature. This is a great way to find other interesting blogs based on what people who subscribe to something you subscribe to are feeding. I suppose it's also another example of the principle behind Pagerank.