One drawback of the iPad which is not a limitation of the device is that the iBooks App is only on the iPad. WTF? Apple thinks only iPad owners like to read? The Kindle gets this right. I don't own the Kindle hardware but still buy Kindle books since I have the App on the iPhone, Mac OS X & Windows.
The iBooks App could be ported to iPhone, iPod Touch and even all Mac's easy. Apple should not limit it only to the iPad.