Purely as an experiment, I’m using “FeedBurner”:http://feedburner.com to keep track of the site usage.
You don’t have to change your RSS feed: I’m redirecting the old ones through to FeedBurner. As a matter of fact, I suggest you don’t change your feed – that way, if I drop FeedBurner, you will automatically switch back to the old direct link.
In addition: at this time, it’s only the main feed that’s been moved to FeedBurner. The category archives, which have a fairly large following of their own, are not going through FeedBurner – yet. 🙂