Return of the e-book?

Sony is going to be partnering with Borders to sell a new Sony Reader e-book reader that utilizes what Sony calls E Ink. The E Ink technology consumes very little power and has very high definition. There will always be something comforting about books, and I can't see my wife or myself ever turning our backs on them completely. Sony's new reader intrigues me, though. Perhaps the most decisive factor for me will be how much memory these readers have. I am notorious for reading several books at the same time, and if I can store many books on this thing, it just may earn a nice percentage of my annual book budget.