The German audio plays may be a good place to start, with some plots and just need the script typed up. That would give folks some time before a script would need to be done from scratch by one of us or a group of us here.
I would guess many of us would need to use some sort of program, if such exists, to make our voice sound like that of a child, without the silly chipmunk part. Being able to alter one's voice a bit to be able to do several characters may be nice also, depending on how many voice actors stick with it.
That is one of the reasons I suggested at first try short little 5 then maybe longer short scenes to get some experience on what it is like doing one, and to get some experience, try things out, experiment ect. One idea for some scripts in the future if we get to trying full hour or movie length audio plays may be past pure lbt rp threads here and maybe some pure lbt fanfiction done by some of the members here, giving due credit of course.
About the doing voice acting together, I'm not sure how the other places do it but some have mentioned good ideas. One of the podcasts I listen to mentioned how they do it. I think they use skype or someother such program, but the reason the podcast sounds good is eaach of the 2 folks in it record only their part of the podcast, then sends it to the main one who does the audio work and that person takes the 2 sound files and merges them.
Using some sort of program so we could be together could be good for practice also, and some sharing tips to those of us who have never voice acted before, and to get over the shyness some of us would feel about doing the voice acting thing as well as to learn how to get better.