This is one of the other points I think is confusing. What exactly is being shared out of reader? I use reader, I've got it linked to my profile, but when I view my profile as an anonymous user it just says no shared items. I never used the sharing feature of Reader before, so I really have no clue what it did previously. Is that was was shared automatically on enroll? I definitely don't see any way for anyone to see what feeds are in my reader.