Each of our developers has his/her own subdomain, for development purposes, e.g.
http://fred.oursite.com
http://joe.oursite.com
http://www.oursite.com
We currently have a Facebook App which we share between all these different subdomains without any problems.
However open graph seems to be really strict about domain names for the "og:url", and it doesn't seem to allow any kind of matching for subdomains. This is a drag on development - our process is to completely isolate the 'live' and 'dev' sites. It would be great if there was a feature allowing us to specify a list of domains?
Anyone with different Country-specific TLDs will surely be given a headache if they separate things between their different domains?