I've been following Julia for over a year (basically since their first public announcement), and I'm genuinely impressed with the team, their attitude, and their approach to designing a new language. Their performance numbers (on microbenchmarks) are awesome. The use of LLVM shows sensibility and pragmatism, and while I don't yet fully grok the type system, I think they're on the right track. I'm also really excited to see a couple of experienced R guys (John Myles White and Harlan Harris) join the Julia bandwagon. Despite the lack of a convincing story when it comes to distributed computing, it's a really promising project.
But, when I think about pushing a significant project on Julia, it feels really risky. I think it feels like betting on Python in 1995 would have. Sure, sitting here today the decision should have seemed obvious, but how many promising languages rose and died in the same timeframe?