The group claims enough signatures to force a recall of Alderman Keith Werner. It was also attempting to recall Alderman Neome Schaumberg and Kathy Chiaverotti (the mayor), but has "suspended" those efforts (there is no suspension in a recall -- you have to start over).
The issue was that the council allegedly ignored a petition containing over 3400 signatures demanding a vote on an issue facing the city.
Making this interesting, Werner has announced he intends to resign as of June 2nd, 2012, which is a week after the recall petition deadline. His resignation would result in the council filing the seat by appointment. So, they will still have a recall.