Hlo Tim,
I used t o run my own tiny podcast, and am now a freeloadin' co host on a different tiny podcast!
First, here are a few options for how to talk to each other without googly hangouts (since we know they're going extinct).
1) You can use skype. It's rough if you have limited bandwidth, and there's not really an integrated screen share and shared document bit in it, but it is hand down the most commonly-used VoiP for remote-participant podcasting. USing skype means you have to use some other stuff with it, but right now it's just VoiP option list time.
2) Discord is a pretty sweet alternative to Skype, and it has a few extra bits built in for chat channels and side-conversation support. You can get Discord
here for free and it runs on most computers and most mobile devices. If you use Discord, the easiest way to record voice conversations is with a second computer that captures everyone in glorious mono. I can get my friend Stuffy to send you a little button script he made to keep it from flagging as afk while you talk.
3) If you really want to go old school, you can check out TemaSpeak, Ventrilo, or any one of a dozen other bare-bones VoiP programs out there. These were all developed for people to talk to each other while playing MMOs or other multiplayer video games. I don't really recommend this option if you want to record it, although Ventrilo has an internal recording ability.
Once you've decided how to talk to each other, there's additional options for how to record this!
1) There are a bunch of free skype call recorders out there.
Here is a pretty good list of 5 good ones. If you have 2 computers, you just put one of those on one, connect it to your skype call, and tadaaaa!
2)
Audacity and
Reaper can both directly record stuff. This lets you use a few different hardware options, but again, the one I know best is to have your talking computer and then a recording computer (usually a laptop) that just plugs in. You can use mixing boards and all of that but I have no idea how and you would need to get Stu to help you. Or just... like, y'know, anyone who's ever used a mixing board.
3) If all else fails, you can get this program called
Virtual audio cables and make a pretend mixing board
with a toaster and some gum I don't know how to do this either.
Now you can talk to each other, and there's a recording of the audio. Now how do you share the visual aides?!
1) Roll20 does in theory have a standalone app that you run through their website. I don't think I've ever used it, but it exists, and that's what matters.
2) When I was running D&D 4 for my WoW friends back in the good old days of 2008, googly hangouts were Coming Soon
TM, so we shared a bunch of googly spreadsheets and just marked those up into battle maps while we chatted on skype. Ask me some day about the bloody footprints, that was a funny story.
3)
Fantasy Grounds is one of Roll20's big competitors. They have their own standalone interface. Unfortunately, they also cost money.
4)
Tabletop Simulator is a game on Steam, and what it does is... Simulate a table. For reals yo. But the super cool part of all this is, the table comes with all sorts of game pieces! So you can make dungeons and download little character pieces and all sorts of fun things. I actually play in a game via tabletop simulator. It would be pretty hard to have a fun science fiction game, but for AD&D it might in fact be perfect.
I sure hope this helps. I don't want to have typed out half a novel of drivel, I've done that way too many times.