... so one can find fellow users from one's own country.
I've tried a search on "denmark" from here: https://sharepoint.stackexchange.com/users
Yields no results.
This is not searchable within the site itself. Once the site graduates out of beta status, it will be included in the Stack Exchange Data Explorer. You would be able to run a query on the location field there.
As handy as it would be at times, this is not designed to be a social networking site so this information is not always easy to come by.
Aside from waiting for us to graduate from beta, you could also try using the API (which I think works for beta sites). Location information will come back via the
If you're not a dev then StackUsers.com seems to be the other alternative. Unfortunately it's not currently working for me.