Well, looks like whatever the problem was, is now fixed!! Huzzah!
For some reason, Blogger is not letting people w/o the beta accounts comment on my page. I don't know why, since I made the switch a while back, and have had comments from these same people since then.
If you can't comment under your usual name, just choose "anonymous" and sign your name to the comment. Hopefully, they'll fix whatever the issue is soon.