The chat room allows anyone with a Ustream account to participate. The Social Stream allows users to log into their Twitter accounts from the Ustream channel page.
If users don’t have a Twitter account, they can view the social stream but won’t be able to send Tweets. Broadcasters and viewers alike can use the Social Stream, and the feature allows users to Tweet questions to the broadcaster and will automatically generate a link back to the Ustream show page. Broadcasters can display both chat and the social stream features or one but not the other.
Broadcasters can change this setting under “Chat” (after logging in and clicking on "Go To Dashboard). Pick the channel (that you want to change the chat and social stream settings) and manage your chat/ social stream settings. To use the Ustream chat, you will need to sign up for a Ustream account and log in.
Note: You must be logged on in order to participate in the chat room. If you are not logged on, you will still be able to view the chat, but not be able to chat within the room.