Being able to dial into a conference instead of just out would be super-useful, especially if, like reserving a URL for a room, you could also reserve a dial-in

Being able to dial into a conference instead of just out would be super-useful, especially if, like reserving a URL for a room, you could also reserve a dial-in code. We have a regular morning meeting in my office for which we currently use Google Hangouts, and it's not really practical to keep track of who's traveling or whatever and won't be able to video-conference in.