From a source that I can verify as being accurate for (at least) the last two years, WWDC 2009 will be held in San Francisco at Moscone West. The dates?
Monday June 8 – Friday June 12
I wouldn’t go booking flights or hotels just yet, but that’s when I’m planning on being in SF again…i.e. nothing’s definite until Apple makes the announcement, but that’s the info I have from a previously reliable source.
Will update info if I get any more news.
Belated Update: I was in Melbourne for the footy when the announcement was made last week, so I forgot about updating this post. Dates above are confirmed. See WWDC site for more info.