Report feed-reader subscriptions using the user-agent subscripton info.

I'm assuming that xstatistics isn't already doing this.

Google Reader, Bloglines and other online blog readers (which will be crawling on behalf of all their users subscribed to a particular blog) submit information about how many subscribers they have for the feed they are fetching in the User-Agent header in HTTP.

Would be great to have this included in the blog subscriber count. What would also be great would be a breakdown of how many people using each reader.

More info: http://www.google.com/help/reader/publishers.html#faq
http://www.useragentstring.com/pages/Feed%20Readerlist/