To upload pictures directly, you need an iPad Camera Connection kit, which is supposed to be available in the next couple of weeks for $29. You can then either use a USB cable from the camera to the iPad via the connector--or even easier--just plug in the SD card into the connector to upload.
I thought that photos looked amazing on the iPad when I looked at my S. American Blog at the Apple store, though I did discover a glitch when I attempted to view them as a Slideshow. I'm sure Apple will "fix" it.
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Eugene