I didn't buy one for precisely this reason. I was dealing with a broken right arm at the time, but the fact is if you read much it does become an issue. I read hard covers, library books and they can be quite heavy. Snarky apple acolytes saying "go to the gym" or "quit whining like a little girl" make me think they aren't really the kind of people I want to know. Maybe they are stronger, but everyone doesn't need to be like them to have a valid existence. Perhaps Pelicanflip has no trouble with the weight, perhaps he doesn't read in bed lying down or what ever. But for some people it is a problem. Just cause something is an apple product doesn't mean it can't improve and it is precisely the criticism of the computer experience that has driven apple to produce such remarkable products. Maybe we'll get a lighter 7" iPad that will be a better book experience.
The truth is, the web is a limiting experience. Books are the source of deeper knowledge and it actually makes a difference if it is easy to hold whether it will be read or fully read.
The snarky comments on this thread are a reflection of attitudes that are quite self-absorbed and non-compassionate, at least today. Hope it is only a bad day, but boy, there are a lot of people in a bad mood about how others experience the ipad. Really, take a deep breath, exhale and go for a walk in the park.