In a press release issued today, Apple has announced that Steve Jobs’ Keynote address at Macworld Expo in San Francisco tomorrow, which takes place at 9:00 a.m. PT at the Moscone Center, will not be webcast until a full nine hours later — “approximately” 6:00 p.m. PT. No reason was cited for the delay, but it is very unusual in light of Keynote broadcasts in recent memory. Apple was not immediately available for comment.