smolt is a dead project and no longer workable for centos6, indeed it will nice to have something like that.This should be a bug raised
Here is a map of locations that have at least 10 installs. An install is counted if it was around for at least 1 month.http://batchgeo.com/map/e875e05b857ef93f1ad61ea1e3324fc2
Shad has made an interactive map