I think it'd be fine to use the front of
fedoracommunity.org as
the
jumping off point into all the various region-specific sites. Some of
them may fall under
fedoracommunity.org, but that fundamentally was to
avoid having people register Fedora-brand-related domains, and then
for us to have to request they sign a trademark license agreement too.
This gives contributors a way to set up sites w/o registering new
domains. But in either case (registered domain, such as
fedora-uk.org, or a subdomain of fc.o), having the top of fc.o
aggregate them into a list makes sense to me.