Typically the team stream is used as kind of alternative to creating another docking project . It's a consequence of the approach that all file merge issues should be sorted out before delivering to the docking project's integration stream.
Sometimes when larger groups are working together to accomplish a common goal before they are ready to share with the remainder of the docking project, it can simply not be accomplished unless the team sets up a common integration stream and copy the approach internally as used on the docking projects - only on a smaller scale.
This could also be accomplished by isolating the team in another UCM project, but very often this would be too much of a construction given the context. After all a UCM project is not entirely a trivial thing to setup in ClearCase and since it's not technically needed it's easier to setup kind of "a project within the project".
Create a view on the new team stream - this will be your team stream integration view.
When you want to join this team, instead of using the join-project wizard, you simply perform the same procedure once more: In Clearcase Project Explorer browse to the Team stream, right-click it and choose the option "Create child stream" - this time you should prefix the stream with your userID unless it's either another level (wow it's getting deep!) of a team stream or a shared stream). Create a view on the stream.
When you join a team, it's easier to do using "create child stream" in ClearCase project Explorer, then it is from the "Join Project" wizard.