::THE SLICE REPORT WITH MONA AUSTIN

buzzz worthy. . . A good thing will come to an end tonight at 11:35 p.m. "The Late Show with David Letterman" will air its 6,028th and final episode on CBS.    News of Letterman's pending departure came last year, giving plenty of time for a long good-bye.  Over the years anybody who was  somebody in Hollywood or interesting people from neighborhoods across the country sat across from Dave in the Ed Sullivan Theater as he asked simple questions and exposed his signature gapped teeth in an easy smile. The last of the "pure" night time hosts (i.e., talking and cracking jokes were his main form of entertaining), Letterman retires with over 33 years in the hosting seat, more than any other late night show host. Conan O'Brien and Jay Leno's shows were cancelled  a few years ahead of Letterman's ending an era of scripted  late night talk with younger, more flexible talents Jimmy Fallon and Jimmy Kimmel remaining in network television late night slots....