Just happened across this post from May, 2006: https://forums.macrumors.com/posts/2382298/
The picture is of a February, 2002 design mockup. Aside from the "silver" and relatively massive thickness, it really does resemble an Air. I think the keyboard is what makes me think that the most.
I started looking around at other early fan-made designs and found this from 2000:
http://www.theapplecollection.com/design/macdesign/eBook2.html
If you put the two together....
Anyway, the second link is kind of a fun site regardless. It was a nice distraction during the day.

The picture is of a February, 2002 design mockup. Aside from the "silver" and relatively massive thickness, it really does resemble an Air. I think the keyboard is what makes me think that the most.
I started looking around at other early fan-made designs and found this from 2000:
http://www.theapplecollection.com/design/macdesign/eBook2.html
If you put the two together....
Anyway, the second link is kind of a fun site regardless. It was a nice distraction during the day.