Presenting Data and Information: A One-Day Course Taught by Edward Tufte is in Madison August 8, 2005 ($320/person):

• “One visionary day….the insights of this class lead to new levels of understanding both for creators and viewers of visual displays.” WIRED
• “The Leonardo da Vinci of data.” THE NEW YORK TIMES
• The Fee includes Tufte’s three books: Visual Explanations, Envisioning Information, and The Visual Display of Quantitative Information, and the 15″ x 22″ Napoleon’s March poster

I attended his course in Chicago last year. Highly recommended. More on Edward Tufte.