[Five]

for the aud recordings, if they are different from what's out there they are worth putting out, if only for the possibility of being used to fill small gaps from tape flips on a better source or just for another persepective. It is a nice touch to find out if your source sounds better/worse than what's out there by contacting somebody who has a copy of the circulating version (if there is one) and getting a short sample for comparison (via rapidshare.com or similar). Then you can put something in the notes of the txt file about this.

with the U2 FM broadcast, it is probably already out there but it is possible that your version could be used to bridge a gap from tape flip on a better-sounding version or that yours is the better-sounding version. If you find somebody who has these shows on their list it is my experience that they are usually happy to help with a potential upgrade.