I tried to keep my hack as similar to the original Blogger functionality as possible with my hack, mostly for simplicity. The code is, in fact, mostly just cut-and-paste from the Blogger comments form itself. I only really created it because it annoyed me to no end (and still does) having to go to a separate page to comment on Blogger blogs and I didn't want my readers having the same frustrations.

I probably won't look into it any more, though, since by now I am fairly sure I'm not going to use it. The Blogger version integrates it better, coming up with your name and other things that we can't do without a bit of Blogger backend template support to aid us.

I like the way your version doesn't go any further than inlining the form, by the way; it makes my comment blogging tool still work for me when I comment here, which Jasper's version doesn't.

Per the radiobutton, I assume you're referring to the odd behaviour it exhibits in that you must click it in order to show the sub-elements? I really should change that to always have them visible when the button is active and never otherwise… it's currently like that due to my lack of knowledge of Javascript back when I started.

(The radiobutton "Other" seems to toggle visibility state of the subformelements only on activation, not when it is deactivated, by the way — might want to change that.)