It's very possible that the date, booked under the name of Apple, will be used for the keynote presentation. Last year's keynote was on June 8th and the year before that it was on the 9th.
Recent evidence discovered in the iPhone OS 4.0 Beta reveals that the new iPhone will likely have two cameras to support video chat.
**Update: MacRumors says, In the absence of evidence or a source for the claim that Apple has booked a venue for June 22nd, we're taking this rumor with a grain of salt. It does match with an earlier report of a June 22nd launch date, but multiple hints have suggested that Apple is planning to hold WWDC a week later than that.
Read More [via Gizmodo]