You should be able to find the answer with these keywords:
MarchOnDC
TeaPartyExpress
There is an update on the 912DC website and I posted a thread on it a few minutes ago.
Update on the March (July 15th)[09.12.09 March on Washington] Monday, July 20, 2009 2:37:54 PM · by Syncro · 2+ views 912DC.Org ^ | July 15, 2009 | Staff
Thanks, have read pard and bumped.