EDIT2: There’s another post for a working explanation to make a broadcom card work with free software.
EDIT: The method I had explained in this post made use of nonfree firmware. Thanks to Broadcom’s lack of cooperation this wifi card can’t be used nowadays with a Free Software OS.
I’m a Free Software advocate so I decided this post had no place in my blog. If you hate freedom you can ask Scroogle how to make this card work, but the best thing to do would be to complain to Broadcom and refrain from buying from them ever again.