I've noticed a bit of a dive in RSS feed subscriptions and think it is because I was interleaving my diigo social book marking in there. I've deactivated this feature, but if you are still interested in what I'm bookmarking...please take a look at my extensive collection which I update as I read through my 300+ SharePoint feeds daily. I find this a valuable resource to pin point paticular areas of SharePoint for good links especially around things like InfoPath, Performance, Guidelines and Standards as just some examples!

From diigo you can actually subscribe to my links as an RSS feed too!