Ice on the official site or otherwise, I'm still holding out hope that we'll see a Diablo-related announcement at WWI (and not a Wrath of the Lich King beta/release announcement, as many are guessing). And here's a little more fuel for the speculation fire: DiabloII.net says they've received the official schedule for the event in Paris this coming weekend, and right after the main presentation, they say that Blizzard has planned a press conference. And basically, their argument is that you don't plan a press conference to announce an open beta of an expansion we've known about for almost a year -- you hold a press conference for a new Diablo game.
We should also note, though people have noticed this before, that Sunday, June 29th, is the eighth anniversary of the release of Diablo II, so this weekend has a lot of hack-and-slash-related significance as is. Of course, we won't know until WWI actually kicks off in Paris on Saturday -- WoW Insider will, of course, have correspondents on the scene to let you know exactly what Blizzard announces when they do.
And even if we don't get D3 this weekend, there's always BlizzCon.