The omnigenously musical Dave Matthews once again teamed up with country musicians in April, when the DMB frontman lended his musical talents to the PBS show Austin City Limits. The series, which started it 25th season on February 5 with Garth Brooks, featured Dave Matthews in early May.  Also appearing on the show was Dave Matthews' friend from last April's Johnny Cash Tribute, Emmylou Harris.  Patty Griffin and Buddy & Julie Miller performed as well.  In addition, DMB pals Bela Fleck & the Flecktones are planning to play for Austin City Limits later this year.   Dave performed Bartender, Diggin A Ditch, The Long Black Veil, and Gulf Coast Highway.