The guests were economist Thomas Friedman and Senator Joseph Biden. Barack Obama was NOT on the program, nor did he appear and insult the flag-- this is an internet myth.
Meet the Press - 1947 2008-09-07 was released on: USA: 7 September 2008
This is a total myth. The president was not on Meet the Press on September 7, 2008, nor has he ever said anything bad about the flag. I enclose a link to the full transcript for Meet the Press from that day. I also enclose a link to snopes.com, which addresses other similar myths about the president and the flag.
Meet the Press - 1947 2008-11-16 was released on: USA: 16 November 2008
Meet the Press - 1947 2008-03-23 was released on: USA: 23 March 2008
Meet the Press - 1947 2008-06-22 was released on: USA: 22 June 2008
Meet the Press - 1947 2008-06-29 was released on: USA: 29 June 2008
Meet the Press - 1947 2008-07-13 was released on: USA: 13 July 2008
Meet the Press - 1947 2008-07-20 was released on: USA: 20 July 2008
Meet the Press - 1947 2008-07-27 was released on: USA: 27 July 2008
Meet the Press - 1947 2008-08-03 was released on: USA: 3 August 2008
Meet the Press - 1947 2008-08-10 was released on: USA: 10 August 2008
Meet the Press - 1947 2008-08-17 was released on: USA: 17 August 2008