I just found this page at KTLA's website in Los angeles... Kind of interesting, like the Millennium countdown clocks which were put in post offices in 1999.
http://www.ktla.com/about/dtv/
I guess we're set for the real thing this time. I'm going to try to find out what KTLA's plans are for the last broadcast, and if they're going to bring in any faces which appeared in '47 when they started. Host/reporter/anchor Stan Chambers has been there since then, and I believe organist Korla Pandit is still living. I'll post if I find out anything.
Charles