I just posted an article that goes into quite a bit of detail about how to create your own Twitter OAuth solution using Perl.
http://www.bigtweet.com/twitter-oauth-using-perl.html I included quite a few code samples and several references. Hopefully this might save a fellow Perl hacker some time in putting together their own implementation. BTW - are there any fellow Twitter Perl developers in the Boston area? - Scott @scott_carter