In this thread PSoC 6 BLE Pioneer Kit Introduction it was said, that these kits will be available in late August and the silicon release is planned for October. And I read somewhere (can't find it at the moment) that other kits are already planned, so I would expect that this fall/winter we will see some (more) DVKs.
Update on the kit availability schedule, it has changed to mid-late September and we are ramping up kit quantities as we speak! Also, we have enabled pre-ordering at our channel partners and there will be a post on how to pre-order in the coming days, so stay tuned!
Thanks for the question and let me know if you have others!