Wishlist: The State of the Feedosphere

I'm starting a wishlist of features/products/whatever I'd like to see coming from other companies.

#1 is for FeedBurner -
David Sifry of Technorati has done a great job reporting the estimated size of the blogosphere with their 'State of the Blogosphere' reports.

While those reports are great, they only shed light on the creation of blog media, but very little on the consumption of it.

It seems like FeedBurner, being a de-facto monopoly in blog feed syndication, is in a unique position to report on the consumption of blog content via RSS readers. I'm sure a bunch of people playing in this space would be very interested in knowing the approximate size of this market, and especially its growth over time (is mainstream adopting feeds or not?).

The only seemingly serious report I am aware of estimating the size of the RSS market is this one by Yahoo, but it seems like it's based more on anecdotal evidence (awareness surveys, etc) than on actual subscription data which FeedBurner has access to.