RSS Neighborhood by Thomas Burg - I do not understand German, but I can follow the links. Check this out:
Similar Feeds uses Share Your OPML! data to produce Readers who subscribe to Mathemagenic also subscribe to...
The way to get it is not very obvious, so:
- Go to http://grumet.net/syo/findThatFeed
- Type the name of your weblog
- Find your RSS feed (if there are several) and then click on <sim> next to it
- Enjoy :)
Thanks go to Andrew Grumet :)
Update 1: Andrew says
The query uses a fudge factor to filter out the most popular weblogs, which otherwise would show up every time.
You can play with including/excluding more popular weblogs by using Tweak results on the left of the list.
Example: weblogs more popular and less popular between subscribers of my RSS feed
Update 2: Try selecting a number (x) that follows every weblog title: it gives you a list of people reading both weblogs.
Example: people reading both Mathemagenic and Ton's Interdependent Thoughts
Do not forget: all these nice things are built based on RSS subscription lists in Share Your OPML!, so not everything is there ;)