http://perl-qa.hexten.net/wiki/index.php/Oslo_QA_Hackathon_2008_:_Topics#Improve_Parrot.27s_smoke_testing
If by some chance you run out of things to hack on, you can help out the
Parrot project by taking a look at our smoke testing system --
specifically, its reliance on, and hackish overriding of, two CPAN modules.