[kukkamario]

I think Mumble's popularity in EVE scene is due to its support for talking to multiple channels simultaneously and ability to do hierarchical voice channels. This is require for large scale battle coordination. Battle group commanders can talk to each other and then command their ships without risk that any "lower level" can talk on top of them and so on.

[nannal]

This also allows for hilarity whispering to users in other channels who will respond to other users who couldn't hear the initial message.