My impression of the service evolved a little over the course of half an hour actually using it. My initial impression was that it was principally for spawning calls between Twitter users. That’s pretty cool indeed.
But the reality is that it can just as easily create ad hoc conference calls between groups of Twitter users. It’s essentially a new form of virtual MeetUp.
In some ways it reminds me of services like Iotum’s Calliflower or Talkshoe. But it’s different in some ways. For example, it doesn’t require and registration beyond your Twitter username. They don’t even collect email addresses.
There are potentially a lot of applications for this sort of thing. I expect we’ll be hearing much more about it as time goes one.