Comment on Comments WordPress SEO Plugin by CK MacLeod.
I can see that your main interest has been SEO-related. My main interest in the plug-in is developing something useful and interesting for site-commenters and others, since I think that with the “Commenter Pages” might make for added value – with each Commenter Page serving almost as a mini-blog or sub-blog for the commenters, and also as a handy repository for their comments. (Registered users or members/contributors could avail themselves of author pages that amounted to their own home pages and would replace Commenter Pages.)
Whether the end result will be a set of tweaks based on your work or something merely inspired by it, I cannot say right now.