Facebook just started adding an option for your brand pages to choose your audience visibility on  wall postings:

Fan page country and language choice

While this may seem like not that big a deal, think of the possibilities.  Users targeting multiple countries and languages can now have multi-purpose brand pages that can reach all, rather than making smaller, localized one-off versions of the brand page.

It will be interesting to see what direction Facebook goes with this functionality – imagine what you could do if it was brought to a city/state/region/mile radius level.  Would this challenge the Facebook Ad network too much? We shall see.