Today I'm praying for New Tribes Mission. I have not personally worked with NTM, but I know people who have! They do Bible translation, as well as church planting and discipleship.
In addition to having daily and weekly prayer requests pages, they also share answers to prayer on their website. These are so encouraging! So often, when we pray for missions, we never really know how the situation turned out or what affect our prayers may have had. Their answered prayer stories are right on the front page of the prayer section [here]. The daily prayer bulletin is here: