wtf?
First of all I agree with Chair's opinion that any .gov should be devoid of all faiths. However, should a tradition exist where an 'invocation of a higher being', then fine, go nuts, but try to avoid favoritism and make it 'unofficial'.
As far as I'm concerned, athiesm is also a faith. Should equal air time be given, then I suppose an athiest would perform the anti-invocation.
To the three that walked out, neato. They excersized their right, as Iron mentioned.