They announced the Due will be released on Oct. 22. There will be an updated IDE to support the Due and all of the other Arduino boards. The announcement said the IDE will make it much easier to support new tool chains and thus add support for new hardware going forward. Not a lot of detail yet. There will also be a new program called " Arduino at Heart" to be something like the Intel Inside program. It's to allow products to show they are using Arduino at the heart of there product.
They announced the Due will be released on Oct. 22.