It is out there, a lot, used in trading houses, used in running credit reports, used for facebook chat, used to route cell phone calls, used as the back-end component to gobs of system (CouchDB, RIAK).
Erlang has a very similar culture background to Go, it wasn't built for Academia, it was built to solve issues right in front of its creators, real world problems they struggle with everyday, inside Google and Erickson respectively.
Both are un-sexy, get-er-done type languages. Erlang has found happy homes all over the place, and I have no doubt Go will do at least as well -- most likely far better.
