I was able to get my hands on a 16 GB WiFi model. Personally, I won't ever use anything close to 16 GB, so I have no need for anything else.
You may think that the iPad is just an iPod Touch with a larger screen, and yeah it might be.
The majority of the iPad is the 9.7 inch 1024 x 768, capacitive, multitouch LED-backlit display. Apple also added the standard "Home" button.
It has a Screen Position Lock switch, which locks the screen in landscape or portrait mode, and a volume rocker on one side. In the upper right hand corner of the top, you have a power/sleep button. On the left of the top, you have a 3.5 mm headset jack, and a mic. On the bottom, you have Apple's 30 Pin connector port, and the speakers.
Holding the iPad, in your lap, has a strange feel. It doesn't seem ergonomically correct, if that makes any sense.
Inside the iPad is Apple's own A4 1 GHz Processor, when scrolling through the browser, you can see that the iPad could really use some extra power. The checker-board pattern appears often. I'm not sure if that is the network, or the processor. Also onboard is 802.11a/b/g/n WiFi, Bluetooth 2.1, a digital compass, an accelerometer, microphone, and ambient light sensor. The 3G model adds UMTS / HSDPA data along with an AGPS chip.
The battery is a 25 watt-hour lithium-polymer, is non-removable. Apple claims it will get 10 hours, and let me tell you, it will not leave you disappointed.
The iPad is running iOS 3.2, and will be updated to iOS 4 later in the year.
The iPad was the first to receive iBooks, and app is very simple to use, but the store lacks compared to the Kindle's.
iPhone apps run on the iPad too, but when you scale up the apps, it really makes it grainy.
Keyboarding receives a lot of hype, on any device. Originally, I thought the iPad would be terrible to type on. It isn't. The keys are large, even for people who have large fingers.
To me, the iPad is great. It has almost completely replaced my laptop. The iPad got a lot of harsh comments, when it was announced, but was it really that bad. I don't think so. The iPad is pretty good. For someone who is traveling a lot, this might be great for you. For somebody who doesn't, this still might be good for you!