Trackbacks seem to be broken thank god for Technorati and Y! tells us how lucky we are because Technorati is the only decent source to tell us who has linked to our blogs.I disgree. Technorati has too many blogs it doesn't track at all, or update for almost a year. Also in the past couple days they are showing the wrong posts.
There are two problems with trackbacks. First they scream, SPAM ME. Second they are depending on special programming on both ends!
The real answer has been with you since the begining, your server log files. These will tell you with who is referring to your website. If you are worried about referral spam, just read the referring page and see if your link is on it. You need to do that with trackbacks anyway.