Well we agree. My answer is not to justify PNaCL, but to let you know that when you say "we commit to this", it means we give some serious investment on Emscripten and building a community. So far Emscripten has only been mentioned as 1-2 slides on each JS talk. And I think we both agree that a serious project as it is, it needs a few people building posting updates and letting everyone about the great work that is being done by @kripken.
Thanks though for your answer.