I'm pretty sure that Stevie said something about an announcement a while ago. I haven't tried to find a quote, but the guys at Engadget sounded suprised there wasn't an announcement either.

I didn't expect one on Saturday, but I thought there would be an invite sent out to journalists at least. Oh well, it's early in the month still. If there are no invites out by the 20th or something, then it will seem less likely that they'll have a press conference this month...