in reply to How to learn Object Oriented Perl
When I started my current job, I was hired to test/develop OO Perl. I knew OO, but not much Perl. Object-Oriented Perl by Damian Conway is a good book. It helped me refresh my OO knowledge, and should help if you have no OO background. Most OO books about design are rather bland reading, so with all of the other reading you've done, I'd shy away from suggesting too much more at this point.
What helped me the most was taking others' objects and dissecting/testing them. If you have the ability to examine a complete Perl OO application, do so. That's the best way to learn, IMHO.