You’d think that this would’ve been done by now, but this simple mashup does exactly what the title says. Just connect your Twitter account and the people you follow popup, with some simple clustering so that people don’t get all smushed together in one location.
Map your Twitter friends
Reviving the Statistical Atlas of the United States with New Data
Due to budget cuts, there is no plan for an updated atlas. So I recreated the original 1870 Atlas using today’s publicly available data.