Geolocation is mentioned as a collected data item for analytics in the State of the Union video of Nov 2014). I would love to see downloads by country. Is that already possible or available in the future?
It's coming, just didn't make it in the first release yet.
Has there been any progress on this feature yet? If not, are there any pointers as to where would be a good place to look at contributing some visualization and/or aggregation of that data?
Unfortunately not. It hasn't been requested much so other things have always been implemented first. It's not forgotten but is constantly being pushed to lower priority.