I've seen this post for a while back on blogger Help site and del.icio.us it. (del.icio.us is a verb. It doesn't have ed at the end for past tense like "put" because it doesn't look good when ed is added) :-). I've been busy and didn't have much time to play with this peek-a-boo comments hack. Today I got a few spare time and here it is. I'm going to post two comments to this post by myself to test how it looks.
Edit: there is some problem showing up del.icio.us tags on left panel. So I've to set it back.
Edit again: I think I did it! Because the manual explained as in general and I've to tweak it to work with the template that I'm using in this blog. If you are having a same problem, hit me up with an email and I will help you out(of course if I can). Have fun! :-)