I received a request not to post this article previously, even though it was posted elsewhere. Craig Larman agreed to send anyone a copy. Now it has a home on the Agile Alliance site for easy access. It's a good read and everyone should check it out.
Craig Larman, Chief Scientist, Valtech USA, email@example.com
Philippe Kruchten, Rational Fellow, Rational Software Canada, firstname.lastname@example.org
Kurt Bittner, General Manager, Process and Project Management Business Unit, Rational Software, email@example.com