In answer to your question #2, I have to say that pugs has already contributed lots to Perl6. By implementing much of the things spec'd out in the various Apocalypses, Exegeses, and Synopses autrijus is "running ahead" of the Perl6 implementation effort and weeding out many edge cases and design faux pas. In this regard alone, pugs will make the Perl6 compiler implementation much, much easier. Also, it may be that if enough of Perl6 is implemented by pugs that it could be the bootstrap by which we get a full Perl6 compiler.
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