I've been thinking about it since it looks neat. But, I can't help but feel like this is an oversized iPod Touch. The lack of Flash (and there's no indication that this will ever change) and no memory slots limits the utility of the iPad. Plus, if you're into e-reading, there's questions about standards since Apple has never been one for following them. It's likely that buying digital books won't be as easy as going to Amazon and create confusion for publishers if they need to reformat everything just for the iPad.
The best option would be to wait for the next generation of the device which will likely be cheaper and probably better.