The press release states that Steve Jobs will be giving the keynote address at WWDC:
WWDC begins on June 23, 2003 and runs until June 27th.
Apple® (Nasdaq: AAPL - News) today announced that Steve Jobs will kick off its Worldwide Developers Conference (WWDC) with a keynote on Monday, June 23, 2003, beginning at 10:00 a.m. (PDT) at San Francisco's Moscone West.
WWDC begins on June 23, 2003 and runs until June 27th.