You're right that the first link I posted is a research paper, and that it should be interpreted accordingly. It is interesting though that in the paper, they compare NaCl to other systems, some of which include ISA virtualization, and they specifically say "we made a deliberate choice against virtualization". And this paper is just a small sample of what Google was saying about NaCl in 2009. But you're right, it is still a research project at that point.
However, you apparently missed the second link I posted, which is in fact a blog post and an introduction. NaCl is no longer a research project there. In fact, the post itself specifically describes the difference between research releases and the release it is announcing.
However, you apparently missed the second link I posted, which is in fact a blog post and an introduction. NaCl is no longer a research project there. In fact, the post itself specifically describes the difference between research releases and the release it is announcing.