29 stunning concepts that paved the way to the Apple iPad

With Apple's official unveiling of the iPad right around the corner, we couldn't help but think back on all of the crazy concepts we've seen that helped contribute to all the hype. The designs were all over the place: regular ol' tablets, tablets that would sit up on stands and double as monitors, tablets that were book-like or featured a second, sliding screen that doubled as a keypad.

Well, here are all those crazy concepts, all in one place. Click through the gallery below to see 29 crazy visions of the shape the iPad could take.