NAAFA (The National Association to Advance Fat Acceptance) (http://www.naafa.org) has linked to a petition - you can sign it here. (http://groups.yahoo.com/group/naafanews/message/332)

(ETA: Whoops, hit post too soon.)

The other thing you can do is pass this along - I haven't seen much of a brouhaha about it. Feel free to link here.