It just got here yesterday and it's really snazzy. It's about the size of a "quality paperback" (and is just a bit heavier, what with batteries and all), it cost about $150 (which I'm justifying as cheaper than two thick tech books), and seems merrily indestructible. Backlit LCD, etc.
And it's just now hitting me that its "little" 64MB memory card can hold not exactly an entire library worth of reading, but certainly a good sized bookcase's worth. Weird.
And I fell asleep last night reading it-- so it IS just like a real book!