Many of the short talks at Perl conferences involve the author of a distribution talking about their own work. After all, who is better qualified to help others use your module than you?
If the idea of proposing a conference talk intimidates you a bit, or you don't want to wait that long, look to your local Perl user group. They're generally looking for speakers (usually for the meeting coming up in the next week or two), and the group size is usually small enough to be a nice casual setting. You can generally find a Perl user group near you by looking on the Perl Mongers web site at http://www.pm.org. If you can't find one, start one!