I'm a HUGE fan of this holy priest's talks -- he hits points (Biblical, historical and theological) I haven't heard anyone else hit in the thousands of hours of listening I've done. I recommend his Doctors of the Church series first and foremost, but for those of you who have either already listened or aren't sure yet whether to invest the time, here's are two recently updated audio files from his site:

Mercy and the Cross - 03-12-2008

Confession and Anointing of the Sick