Tracking anonymous users

Some one, I will say anonymous, posted a comment on my blog. WOW Ppl do read blogs. The blog was about How I cracked the infamous SEO and Google and Link buliding and watver U may call it the trick to come on top on Google. Actually it was not I was so excited that I just blogged my emotions(SOB!! Khushi ke Ansoo) Anyway. Tracking anonymous users is tough task. Now I want to see that User. :-? BTW blogger shud be able to decode Yahoo! smileys. I think I need to put some extra effort and BTW this is first day I have blogged for more than once in a day. MAN!!