Thursday February 9th, Twitch announces that they have created Twitch Streaming Communities to enable users to easily find new streamers. This is the Beta and Twitch is simply testing the waters. I have a strong feeling this is going to be a big hit.
Users can find a community by searching by interests. This is also paired with the games side bar, so when you look up a game, you see the corresponding community right next to it. This creates seamless searching and discovering new streamers.
Support Twitch and provide your feedback. The only thing that helps a beta make it to the next stage is feedback and tweaking!