The first thing I find is that the regions are limited to some countries, however, that I stopped to take a look to share this interesting web service that allows us to read the most interesting Twitter classified by regions.
While the ability to filter the information regions of some countries is now only available to much of the United States, India, Canada and Australia also lets you see what is happening around the world. Sure, it will be difficult to find any relevant information from Mexico, for example, but at some point if Twitter will explode.
As always, the idea is great, I see Frrole Flipboard with Twitter on the web by the way content is displayed. Sincerely hopes that at some point we can expand coverage and see from there where we are located local information. For now we will only see information from countries quite distant. Link: Frrole