GPL is a MAJOR breakthrough for visualizing data.  It happens to be in SPSS 14.0, but it is a breakthrough in general, not only for SPSS users.  It is a completely different philosophy.  I will have more posts on this, but check out this links.

For some neat examples of cool charts many of which one could imitate in GPL see

For more information on the person who created the concept:  Note the Grammar of Graphics. Follow that link.

GPL doesn't have anything to do with Tufte per se, but many folks I have had in class see a synergy.  There is no direct link between the two authors. I'll let you decide.