Perhaps, if we can group blogs like 3DS Photos, maybe we could subscribe to a blog series. Or even subscribe to a blogger.
If it caused debates like a religious blog, maybe we could subscribe to the comments to see when the next point comes up.
Subscription to me is...well amazing. I can carry on multiple conversations on different threads and get a notification telling me when I should reply. This was I can have conversations doing have the work. The idea of new features is to make things easier for members and subscription does just that for me.