Edit: Checking the NIC rules, actual IO residents with servers in the territory can use the reserved third level domains like foo.com.io. I still can't find any that actually exist.
Was one of the reasons I didn't buy Fatou.cat as a domain for my cat's blog (left it at tumblr), or thefancypuffin.cat for our handmade shoemaking business (in addition to the larger exposure of .com domains, of course)
.io is clearly a gccTLD. The TLD administration and commissioner in charge of 'the government' reside in the UK.
[1] http://en.wikipedia.org/wiki/British_Indian_Ocean_Territory#...
http://clay.io/blog/an-appeal-to-google-make-io-a-gcctld/
> “If no information is entered in Webmaster Tools, we’ll rely largely on the site’s country domain”
"If no information is entered in Webmaster Tools" -> "It's possible to enter information into Webmaster Tools"
He later says:
> Even if ccTLDs and gccTLDs were treated exactly the same in terms of ranking, Google does not take into account the Geographic target set in Webmaster Tools. Own a “.io” domain and want to target towards US searchers? It doesn’t work.
With the evidence being that socket.io is only a 19th in a search for WebSockets, which I think so sorta shaky, but there you go.