I found a great little tool tonight called FeedCompare. FeedCompare is a free online service which allows you to compare your feedburner count with other blogs.
To compare blogs all you need to do is enter the feedburner feed address of each blog (or the short name extension eg ours is Blogging-Tips). The site then builds up a graph showing you how your blog and others have grown over 1, 3, 6, 12 and 24 months.
Definately worth checking out if your nosy about your rivals! 😉
Link : FeedCompare
* Thanks to BlogPerfume for the heads up on this 🙂