There has been some rumbles about this since about October. Finally we have a campaign site for Ed Eisendrath linked from IlliniPundit. Eisendrath was a member of Chicago's city council and has been out of politics for a while until his disappointment with Governor Blagojevich.
Right now the idea is that if nothing serious as far as any serious improprieties in Blago's administration, then bumping the governor from office will be much more difficult if not impossible. I just hope Eisendrath will prove to be Blagojevich's toughest competition, indeed I hope Eisendrath may win the primary. I just haven't decided which ballot to pull at this time.