Talked about Testing
Related link: http://magnonel.guild.net/~schwern/talks/
The URL above gives access to most of Schwern's stuff. His "How to be Lazy Without Really Trying Redux" is great, and "Writing a Test Library with Test::Builder" really ought to lead to several more domain-specific testing libraries. The more good tools we have, the easier it will be to write high-kwalitee software.
I've fixed two bugs in the Test::Tutorial slides, so get the latest version from my site. You might also like the additional details in my Introduction to Test::More, which I presented to the Portland Perl Mongers in July.
If you're still not satiated, drop by Perl QA sometime. There's plenty to do, and I guarantee you'll learn a tremendous amount.