I agree that the 3G is not necessary for my experience and that this thing should sell for $99. Amazon has just moved to selling more eBooks than hardcovers, why not just keep going with that.
As for the full tablet experience, an incremental approach sounds right to me. Next, how about an audio player for Amazon MP3s. Then color screen and the ability to download Amazon video. That way they keep generating revenue and utilize it as a tool for selling more stuff which is all it was ever designed to be.
Me, I'm sticking with my Netbook as well. I watched a few people during a summer course I took trying to make it with just an iPad. It's not there yet. Hell, I like a keyboard and there's that whole printing thing and...
But if it comes below $100, I might get me a Kindle.