For quite some time now, Game Update 1.3: Allies release date was a mystery. However, in the usual scheduled maintenance post, the update's day of destiny was unveiled as next Tuesday, June 26.
Quote from BioWareHello everyone, we wanted to let you know that we will be performing scheduled maintenance for four hours on Tuesday, June 26th, 2012 from 2AM CDT (12AM PDT/3AM EDT/8 AM BST/9AM CEST/5PM AEST) until 6AM CDT (4AM PDT/7AM EDT/12PM BST/1PM CEST/9PM AEST). All game servers and SWTOR.com will be offline during this period. This maintenance is expected to take no more than four hours, but could be extended.
Game Update 1.3: Allies introduces new features for all Star Wars™: The Old Republic™ players including a Group Finder tool, Legacy Perks, Ranked Warzones, and Adaptive Gear! Now you will be able to quickly find groups to take on Flashpoints, Operations, Warzones, and Planetary Heroic Missions. The Legacy System incorporates new bonuses including Advancement Perks which allows you to customize your leveling experience. With Adaptive Gear, social gear can now be used in combat, by fusing it with corresponding armor bonuses and creating slots for modifications. These are just a few of many exciting features of Allies! Learn more about Game Update 1.3 here!
In the meantime, if you're interested in learning more about the update, check out our coverage post.