The internet's going bonkers: what will Nintendo show tomorrow? There's a good round-up of all the various rumours on Bloomberg, with a few quotes from analysts thrown in to make it sound "grown up."
Basically, the smart money says it's going to be a new DS, and a lot of talk has emerged today regarding a new set of Wii peripherals, as you'll see in that Bloomberg piece.
As reported this morning, the amazingly risky rumour doing the round regarding software is that we're going to see an update to an existing license. If you have a press, you should probably stop it.
For your information, the conference is happening simultaneously in Tokyo and California. We'll bring you some solid details about timing tomorrow.
More educated guesswork through the first link.