How Can I Generate A Twitch Key For Other People To Stream On My Channel With?
You can add other users as Authorized Broadcasters. This shares your stream key. To do so, go to http://www.twitch.tv/settings/videos and scroll down to Authorized Broadcasters.
NOTE: This shares your stream key only. Authorized Broadcasters cannot edit the stream title. To do so, you must also grant Editor privileges to your channel.