There are items, which management, for instance, does
not
want available
to everyone, while in preparation. It is not about things
being secret.
Rather about things being presented at a given time, in a
given shape. A
reasonable policy for a proper internal communication.
It doesn't sound like you need per page read permissions, it sounds like
you need a versioning system. Mark items that aren't ready as draft; or,
even better, used the Flagged Revs extension, and mark the item as draft
through that.
Per page read restrictions are likely to never be properly supported in
the software, and if you *truly* need it, you should look at using a
CMS, or a wiki that was designed for this.
V/r,
Ryan Lane