At some future point in time, when the technology finally allows it, all ebook reader displays will make the jump to color. Perhaps that's what Barnes and Noble is thinking by registering the nookcolor.com domain. Then again, "Nook Color" is the name rumored for B&N's new 7-inch color touchscreen device said to cost a mere $249. Or maybe it's just a collection of colorful snap-on bezels for its existing Nook. Whatever it is, we'll be treated with the truth on Tuesday when B&N hosts its very special event. Be there won't you, we will.