Engadget had a hands-on experience with the Apple iPad and published a writeup of their first impressions. The reporter notes the device feels pretty heavy in your hand and was impressed by display. The Apple processor is reportedly quite fast, but there's no support for multitasking so you can't stream music while surfing the web, and another drawback is that the keyboard is not as responsive as it looked in the demos.
There's no multitasking at all. It's a real disappointment. All this power and very little you can do with it at once. No multitasking means no streaming Pandora when you're working in Pages... you can figure it out. It's a real setback for this device.
The ebook implementation is about as close as you can get to reading without a stack of bound paper in your hand. The visual stuff really helps flesh out the experience. It may be just for show, but it counts here.
You can check it out over here, they will soon upload a full video walkthrough.