If the rumors are to be believed, the current keyboard is no longer shipping, so that would indicate the answer is 'yes.' With that said, we don't really know 😛
Yes. The new keyboard would replace the Apple keyboard. I hope they also make a matching mouse to go along side. The mighty mouse is OK, but I'd like something new. Maybe they'll announce the rumored "Multi-touch mouse". 🙂
I hope they continue to sell the current keyboards - I love them. I don't think I'd like a slim keyboard - I don't care for the MacBook keyboard all that much, so doubt the new keyboard will be all that great for me