I recently went through a job change and and it highlighted how so
many companies call the same role differently and different role with
same title. For instance one of the organizations considered
Interaction Design as really only graphic design and considered
Informaiton Architecture to include Interaction design as well.
Here is an experiment, I have created a wiki http://uxroles.pbwiki.com/ for all of us to come together and bring a
common understanding towards the roles.