I saw my subscriptions increase a bit the last week or so, and it looks like the culprit is Rojo (along with some prominant referral links from a few of the big guys) which didn't appear in my reports at all. I'm guessing the reader market share changes have to do with the recent Feedburner redesign and that maybe that effort included some adjustments to their tracking system. It looks like My Yahoo! is on the rise, and it's possible that the Rojo usage is eating into the Bloglines usage. I haven't looked at Rojo in a while, so it's probably time to have another try with it.