Just had my phone interview this morning. I asked specifically about the contradiction from the recruiting board at WIA (no mass app window) and what she was telling me (mid to late April opening an app window). She stated that Alaska HR/Recruiting was under the impression that it would be a single app request sent out to individuals as they were being offered an interview. She further stated that this is the goal, but that they had not met the goal as of yet and probably would not meet the goal until late this year. And since AAG had turned over this process to them, it would be a window of opportunity (mass app window) mid to late April (2 months behind schedule given by AAG).
I would check the website given in the phone interview every few days beginning next week and see what happens.