I was always frustrated that the Google back-links list (using the link: operator) was very incomplete. Well, apparently Google listened and they now provide webmasters a complete list of backlinks to pages on their site, using the Google webmaster tools.

Using it, I found out that most pages that link to the top of my site are my own links at my signatures and stuff, and that someone quoted something I said about re-inventing wheels in his signature (in an Italian forum), and then someone wondered about the origin of this quote and someone found it on Google, and linked to the page on my site.