While I haven't stumbled upon a script that could automate the process of 'evaluating' the quality of your perl code, there are plenty of online and print resources you could find helpful. Perl Best Practices (review) by O'Reilly is invaluable in that regard.
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"We've all heard that a million monkeys banging on a million typewriters will eventually reproduce the entire works of Shakespeare. Now, thanks to the Internet, we know this is not true."