Yes, DIY3 is coming. We got hit with several people needing to take extended time out of the office, and as a result our resources are spread very thin. Jon has been filling in everywhere as needed.
Now with NAB over and folks returning, we should be able to get this thing published very soon.
As for Dual Core - that will be DIY4 or 5. It's very exciting technology, but also has some potential for stability/ performance issues. We're going to need new OS tweaks and optimized drivers and software for this. I'm thinking later this year.