For everyone winging about how the iPad doesn't have multi tasking, there's an interesting article on Smoking Apples on Understanding Multi-tasking on the iPad with some clarifications about what it is or isn't, and what you may or may not use it for.
The point that it's not really multi-tasking of running multiple apps that people are bitching about, but the session based "using multiple apps at once" type of multi-tasking that people want. Maybe this is a new paradigm in using the computer that people will either like or not like? My thoughts are that the iPad will be great for some people with some workflows and requirements, and not good for others. Buy one if you want one, I don't care :P