I think we might want to have a [Mark (all) read] option on the Recent changes All and Blogs pages.

As the number of daily postings will certainly grow in (near) future, it's not very likely that visitors will select every single input for reading. Even now already, I would like to skip certain inputs. Currently, one is forced to open>close the posting without even casting a quick glance at it's content to get rid of the [new] indicator.... waste of time.