What about using the standard country codes?
Canada = "CAN", Switzerland = "SUI" etc.
Then every country is just 3 letters :-D
Might be a bit of a struggle though, for people who don't know many country codes OR flags...
But a country code carries more meaning than just blanket "We", at least?
Edit: oh sorry, was catching up on this thread, and now I see the conversation moved past having flags at all, oops ^_^;
(Are country codes a no-no, same as flags? Only, they'd keep the original concept of showing the variety of countries - but clearer and more visible from a distance than maps?)