I’ve recently stopped using my previous anti-comment-spam plugins (Captcha and Akismet), which were still letting way too many spam comments reach me, and replaced them with WP-Spamshield, which seems good… almost too good. It’s apparently stopped over 5,000 spam comments already. But it blocks them from even reaching my spam comment folder, which saves me the trouble of clearing it, but does mean that I don’t know whether it’s had any false positives.
So, if you’re a real person, and you’ve posted a comment recently, which hasn’t yet been approved and posted, then it’s probably been wrongly blocked. Please let me know and I’ll try to sort it out.