I wrote a java tool to map the people I'm following on twitter. This tool invokes the twitter API to fetch the profiles of my contacts and it uses the geonames web services to guess the geolocation of the places.
The source code is available on github at https://github.com/lindenb/jsandbox/blob/master/src/sandbox/TwitterToKML.java.
the build.xml is here.
#get your twitter-id at "http://api.twitter.com/1/users/show.xml?screen_name=<your-twitter-username>"
java -jar dist/twitterkml.jar -g <geonames-id> -o result.kml <twitter-numeric-id>
##WAIT. I don't use the OAuth API, so my program waits until the 'rate limit' is enabled again.
View @yokofakun's followings date:2011-04-28 21:03:42.079 in a larger map
View @yokofakun's followers date:2011-04-29 in a larger map