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Code Review Ladder Mailing List
The idea behind the mailing list is that you can post your code to be reviewed, and if you get good feedback, you ought to feel some kind of moral obligation to help the next guy along. I've taken the concept from the go teaching ladder, where it seems to work quite well.
This isn't just for CPAN code, although improving CPAN is an intended goal. Post any code you'd like reviewed, and if we reach critical mass, you'll hopefully get some decent improvements on it."