Yes, I'd at least like a third level of security: ignoring filters, currently DW has two levels of security, no permissions and "allowed to see your locked posts" (with Grant Access), but it would be nice if there was "allowed to comment without being auto-screened", as well, which could be granted without granting access. I've suggested something like this before, but gotten shot down. I think it would be useful, though, for people who run more of a "blog" (with lots of people commenting, who you don't necessarily trust with your personal secrets but who you're OK with allowing to comment) than a "journal" (for a group of trusted friends and no one else).