There are a dozen or more lawsuits pending, all of which to date have been dismissed before going to trial. Once one of them succeeds in getting past that first hurdle then I suggest it's time for the publicity.
There are 16 pending lawsuits in 12 states:
http://atlasshrugs2000.typepad.com/atlas_shrugs/2008/12/obamas-forged-b.html