OPML in case you didn't know, is a list of the RSS feeds you subscribe to (ie the blogs you read).

A new site share.opml.org exists for sharing those feeds, much like del.icio.us does for bookmarks. The site shows a number of interesting things, amongst which is the ability to find others who have a similar subscription pattern to you, so you can hunt around for other interesting blogs to read.

Go have a look. P.S. My feeds can be seen here.