The developer conference was, which is a bit later than usual. The late notice gave developers only six weeks to make the necessary plans to attend, but that doesn't seem to have been an issue.
Apple representatives were not immediately available to comment on exactly how many developers had signed up for the conference, but a note on its Web site says 1,000 Apple engineers and 5,000 developers will attend the conference.
WWDC will focus on five main areas, covering most of the company's technologies. Sessions include Application Frameworks; Internet & Web; Graphics & Media; Developer Tools; and Core OS.
Apple's iPhone OS 4 is widely expected to make an appearance at WWDC. The new mobile operating system wasand includes multitasking, Game Center and iAd, among other features.
WWDC is also traditionally the time that Apple shows its newest Mac operating system to developers, but Apple has given no indication that it will happen this year.
We also don't know yet who will give the opening day keynote speech. Apple CEO Steve Jobs normally delivers the keynote, but the company has not said who will be called on to do that.
Apple's Worldwide Developer Conference runs June 7 through 11 at the Moscone Center in San Francisco.