I use Skype to communicate with a lot of people much in the same way Max says he uses Wave; we have several group chats open. Wave sounds like it would be a good fit and more flexible than Skype, perhaps.
I use Wave as a compliment to Skype. Imagine you're working with somebody on a timeline or document. As you talk over Skype, both of you can edit the document at the same time and you can see and build on each others edits. It's incredibly productive for this specific purpose.
