You might be familiar with Notion Ink, one of the hot new tablet companies. They're working on several tablets right now, and there is a lot of hype surrounding them. (Part of this is becuase their tablets are based on Pxel Qi screens.)
A few days ago, Notion Ink dropped this hint on their blog:
I think you might have heard about Google Tablet. In time to come we all would know what Notion Ink might have to do with it!
To get back to my original question, I would say no. If they were really working with Google then they wouldn't have dropped the hint.