They just posted next year's supercross schedule and they added Salt Lake to the list.  Plus a couple of other new places.  Check out the schedule below:

January 3, 2009                      Anaheim, Calif.                       Angel Stadium January 10, 2009                    Phoenix                                   Chase FieldJanuary 17, 2009                    Anaheim, Calif.                       Angel StadiumJanuary 24, 2009                    Houston                                   Reliant StadiumJanuary 31, 2009                    San Francisco                         AT&TParkFebruary 7, 2009                    Anaheim, Calif.                        Angel StadiumFebruary 14, 2009                  San Diego                                Qualcomm StadiumFebruary 21, 2009                  Atlanta                                     Georgia DomeFebruary 28, 2009                  Indianapolis                             Lucas Oil StadiumMarch 6, 2009                         Daytona Beach, Fla.                Daytona Motor SpeedwayMarch 14, 2009                       New Orleans                           SuperdomeMarch 21, 2009                       St. Louis                                  Edward Jones DomeMarch 28, 2009                       Toronto, Canada                     Rogers CentreApril 4, 2009                            Jacksonville, Fla.                     Jacksonville Municipal Stadium April 18, 2009                          Seattle                                     Qwest FieldApril 25, 2009                          Salt Lake City                          Rice-Eccles FieldMay 2, 2009                            Las Vegas                              Sam Boyd Stadium