I know other people have requested this, so it isn't so much a feature request as I'm just wanting to know if it's a planned feature at this point. I know a lot of people favor open-to-all commenting, but some bloggers prefer to make it members-only and not have to think about Anti-spam at all.

Reason I ask is, I was in a position where I wanted to recommend b2evolution to someone looking for a new blogging program. This blogger had a HUGE problem with MT and comment spam, and wanted something where he could have members-only and not even have to think about removing spam. I love b2evolution and wanted to recommend it, but I discovered we don't currently have this feature...

Something to think about. It does seem to be something a lot of bloggers want (particularly the ones with huge hits).