I was thinking that the iPad Mockup sighting at CES was the last, but its turning out the other way. People are having field day showing off iPad 2 mockups, some of which gives a decent view of what the next gen iPad might look like.
First set comes from iLounge which spotted it a pavilion. Yeah the iPad 2 tag on the back is real subtle :
Next set comes from Micgadgets doing some photoshop renderings of their own :
Again these all are made based on the leaked rumours and info. So, enjoy and take them with a pinch of salt, next gen iPad might turn out completely different from these things.