In the latest update of vMix, we have included support for direct streaming to StreamSpot. If you have an account with StreamSpot, you just need to select StreamSpot from drop-down menu in the vMix Streaming Settings. Once you’ve done that enter your StreamSpot Username and Password. You’ll then be able to select a channel to stream to.
If you’d like to give StreamSpot a try, they have a 30 day Free Trial on their site.