Bungie has said when the Destiny Xbox Beta should be out and the list of Trophies / Achievements for Destiny was in Bungie's Weekly Update.
Bungie has said the Beta for Xbox One / Xbox 360 should be out late July.
The PS3 / PS4 one starts on the 17th of July so the Xbox Beta should not be long after that.
The list ( but not sure if this is the full list ) is on the Bungie's Weekly Update - 06/27/2014.
There are 40 on the list and i think there are still going to be 10 more as this is Bungie.
To see the list go to the Bungie website