We really need Amazon to start accepting Bitcoin as payment again.

Has anyone heard anything in this space?

Nope, but it could be great if amazon starts accepting cryptocurrency since it can help boost the market demand of cryptocurrency and also can make payment easier for it's user.

I came accross this article and might be worth to read since this is somehow related to your post.

https://www.google.com/amp/s/ethereumworldnews.com/rakuten-exchange-could-push-amazon-to-accept-cryptocurrency/amp/