there's an amusing poll on the da vinci blog of the denver post which asks which organization would you trust to issue their own money. examples include wall mart and harvard university, wells fargo. i chose wal-mart. wal-mart's ahead at this time at 16%.
http://www.impactlab.com/modules.php?name=Surveys&op=results&pollID=19&mode=&order=&thold=
I voted for Lloyd's of London, but only because they've been around for so much longer and will probably be around when Wal-Mart disappears.