It's not offical, but several reports indicate that Google will/is not treating the .co as a ccTLD but a regular TLD like .com/.net/.co. In my opinion, that makes it an interesting TLD.
http://www.pcpro.co.uk/news/359704/google-approves-co-domain-for-international-use
http://www.cointernet.co/blog/co-google-national

