Broadcom 43xx based wireless cards on Ubuntu.

No no, I did not write the tutorial, DarkN00b did . I do not even own one of these wireless cards.
But this is a very popular tutorial on UF, and many users post they have looked a long time before finding it. So I’m going to link it over here.

HOWTO: Broadcom 43xx based wireless cards the EASY way.
Please read the disclaimers in the first post, and enjoy!