IS it possible to something like this:
http://api.twitter.com/1/statuses/followers/xxxxxx.json
but instead of list of people following you, list of people you are following?
Looks like this is what you need:
https://api.twitter.com/1.1/friends/ids.json?id=:screen_name_or_user_id
https://dev.twitter.com/docs/api/1.1/get/friends/ids
Once you have the list of ID's returned, you can look them up by passing them as a comma delimited list to another API call:
http://api.twitter.com/1.1/users/lookup.json?user_id=[comma delimited list goes here]