A lot of my ideas hinge on knowing the username of everyone that a specific Twitter user is following. Unfortunately Twitter doesn't make this easy. So, I hacked together a little web service that would do it for me and cache the results.
Clone the repo, run npm install then run node index.js.
Send a request to localhost:3000/?id=<id of the user you want to know who they're following>.
You'll get back a JSON response. The key is the user's Twitter ID, the value is their username.