Received word today that DAL is increasing interview "opportunities":
We are writing to inform you that there are additional interview opportunities available for February and March. Due to an ambitious future flying schedule, we are increasing our training classes during the spring months and this necessitates interviewing additional candidates. This increase also offers the opportunity of joining the Delta Flight Operations Team sooner than expected.
We interview every weekday except Friday and openings exist for each of these days in February and March. We encourage you to interview at your earliest convenience in the coming weeks.
Good Luck!