Go isn't the only language that matches those requirements though. I took a long hard look at Go for very similar reasons and ended up deciding on Scala.

It feels like a scripting language, incredible performance, extremely compact code when you need it to be, actors.

>Easy CSP-style concurrency: goodbye races and deadlocks w/ threaded code.

I actually disagree with this, CSP style, actors, message passing, you still have potential race conditions and deadlocks. What you gain is a nice separation between what is shared and what isn't. Just don't think Go's concurrency is the many-core silver bullet anymore than locks or Tx Memory is...