Much as I enjoy using voice communication as a roleplaying medium, it does have it's drawbacks. The main one is that it's hard to deal with the math and formulae - pronouncing all of that in a way that everyone understands is tricky, and that's not even getting into language barriers / accents. As a result, you'll probably want to use it alongside a typed / written medium, such as Google docs.
No, if you are doing a voice medium for a game, you want to also have a chat room such as openrpg, IRC or AIM with die roller for doing the dice rolls and writing out things like math numbers for sponts and such.
I do a text based game via openrpg once a week. It works out.
My sister, who lives out in the countryside near precisely no gamers, has bullied me into running a four-player Deathwatch game over skype. It works well, but requires a lot of setup time. I can't draw quick sketch maps at the session; I have to prepare everything in advance.
I prefer voice chat to text simply because text takes so long. I can bully players into taking their actions quickly in tense scenes, which is vital in an action sequence, over voice, but via text it's impossible.
connect everyone to openrpg (easy software to find) and then you have a dice roller, a place for writing out formulas as needed and the map can be a freeform sketch pad for you to draw things with mouse but start skype and once everyone is connected, minimize it so you can see the openrpg screen. Then you have a voice based game with some text/writing/sketching capability at need.
Has any found a diceroller and/or openrpg-type android app that they like? Free or paid - I don't mind paying for development.
I realize there are any number of text/voice/video chat programs out there, as well as collaborative tools like google docs, but I'm looking for something more gaming-friendly.