While theres been much talk about the changing Phoenix area, Tempe is the part of town perhaps the most under siege. Long-timers remember the days when Mill Avenue was a cool place to be when mom-and-pop businesses and live-music venues lined the street. Now . . . not so much. Local filmmaker Nicholas Nico Holthaus takes a look at how the gentrification of Mill has affected the city and its dwellers in his documentary Mill Ave. Inc. The filmmaker interviewed musicians, nightclub owners, Mill Avenue architects, Tempe Mayor Hugh Hallman, and a slew of other people both involved with and affected by the changes.