The pre-NAB speaking announcements are ramping up. Author Veronica Williams will address a session of the show in Las Vegas on April 9. Her topic: "The Changing Face of Broadcasting." She has addressed several conventions and talks about technology in the media and in books including "Wireless Computing Primer: A Comprehensive Guide to Wireless and Mobile Computing" and a pending text "Turning Technology Into Value." Info: www.nab.org/conventions/nab2003.