Open Alpha release - 6/25/2014 - NEM open alpha has launched
NEM stake public auction                                 - After/during open alpha release - no exact date
Open Source NEM Community Client                - NCC is Open Source now: Get Involved
Open Beta release                                           - raw estimate: September 2014
Official launch and distribution of real NEM         - raw estimate: October 2014
V1 blockchain completion                                - TBA