Thanks for posting this, Al.
For those of us who like instant gratification, the Library of Congress web site has links to several downloadable/printable versions, as well as commentaries and judicial decisions:
http://www.loc.gov/law/help/guide/federal/usconst.html
And Wikipedia is a decent source of information on the Constitution and Bill of Rights; as well as the texts of the original documents, there are handy summaries of content and interpretations, discussions of some of the ambiguities, etc.
http://en.wikipedia.org/wiki/United_States_Constitution
This could usefully be a sticky, no?