On April 5th, James Anderson (Oneness) and Michael Burgos (Reformed Trinitarian) will be debating the pre-existence of the Son. It will be live online and will be available as mp3. You can read the details here:
James Anderson of Evidential Faith has posted a link to a debate between David K. Bernard (Oneness apologetics) and Jamal Badawi and Shabir Ally (Islamic apologetics). You can see James’ article here: