My thoughts on a radio show have changed. While the way I came up with will work. It is incredibly tedious. The better option and the one that I will use next time is to have them all write and print out their approved scripts. Then set up a few different computers for a podcasting station. There, they can use audacity to record and create the podcast.
iPads are great, and if I wanted to make individual recordings, this is a create solution, but I see over 350 kids a week, and this is just too much for me to pull off (and to want to do it again.) So, my quest continues to incorporate the iPads into the classroom in a daily way.
If you have ideas of how to incorporate two iPads in a class of 20+ kids. Let me know!