I have a friend who has one, and she absolutely swears by it. She uses it as a replacement for her - admittedly crappy - laptop, but doesn't really take it out of the house (in case it gets stolen/damaged) so...if you're not gonna take advantage of its portability, then I don't know whether it's worth it.
It looks interesting enough, but other companies have created better/more efficient products. All Apple does is take existing products and make them look shiny and purrrrdy.
It's basically a large iTouch...they haven't even added in the call features (with a microphone so you don't have to hold it to your ear, I mean) of the iPhone.
In my opinion, the iPads are NOT worth the money; most of the things on it aren't geared towards the casual user and, even if you ignore the presentation/document creating features, is the fact that Apple's software is largely static gonna put you off? If all you can do is Jailbreak it to get a couple of fancy backgrounds, is it worth it, when a laptop can do SO much more?