You'll need to get a set of Twitch API credentials from https://dev.twitch.tv/dashboard/apps/create and store the ID/Secret in config.json. Once you start the go program just point your browser to http://localhost:8080/ and you can browse through streams with no gameid set 50 at a time.
Cool! I went ahead and added category sorting last night to twitchroulette, check out the "unknown" filter to randomly browse through streams with no category set. Theres some weird stuff in there for sure (and quite a few pirated movie streams)