It downloads all of your favorited songs into a folder and saves them as album name - song name.mp3.

$ python main.py <your_user_id> ~/Music/Grooveshark

Sniff the requests sent by Grooveshark. Most of those have it in the sent JSON. You can also get it out of your profile picture URL:

http://images.gs-cdn.net/static/users/40_12345678.jpg

Here, 12345678 is your user id.

I wrote it in an hour and a half and it works for me. The code is somewhat readable, so send a pull request if you find something terribly broken.