An Account To Stream To
There are quite a few websites out in the wild, blue internets that will allow you to stream your biggest Street Fighter knock-outs. While Ustream, Livesteam and justin.tv are all mainstays, twitch.tv is the most popular for gaming. Getting onto Twitch is as simple as logging in with your Facebook credentials or signing up with a username and password.
Once signed up, you can edit your profile and make general customizations to your video player.
Picking which service is entirely up to what you're comfortable with. Twitch has tens of thousands of streams going on so if you're looking to become popular fast, it's not the way to go. A site like Spreecast is still relatively new so that would be a great place to plant your stream and build an audience.