After he died, in 1951, his will was slowly picked apart until legal permission was granted to move the pieces from his private museum outside Philadelphia to a soon-to-be-finished public one in the city proper.
As you mentioned, the rally downtown is over now, but slowly mothers and family members of troops who've died in Iraq have been making their way out to Camp Casey, this site along the road to President Bush's ranch where Cindy Sheehan has been camping out.