We’ve added the cite tag to previous entries to mark references to other people, companies, and Web sites. Mark Pilgrim made this simple semantic gesture famous late last year when he used the cite tag to auto-generate a list of posts by citation. We’ve done no such thing yet, but the key here is that enhancing our markup gives us options. Writing semantic markup up now means that we can implement this, or something similar, someday, because the markup’s already there.
For further reference on using rich markup see <A>norexic </A>nchors by Tantek Celik, and comments on Mark’s system at Couchblog.