I used wordpress to do this, which automatically does the trackback ping for me as long as it knows the appropriate uri.
I write a post:
http://www.erotophoria.com/blog/2006...al-orgasm-day/
In the body of my post there is a link to a friend's (Simon) post:
http://www.xratedtv.com/xlog/2006/12...mber-22nd.html
Notice that Simon's post has a comment down below which quotes part of my post? This is a trackback. Anything more is too technical for me to understand.
Does this answer your question?