Sports, business, medicine, arts.. the word "team" is often used - sometimes to explain how many folks are working on a project (even if they never all meet or talk), sometimes to spread blame or make a decision seem less unilateral, occasionally to create a sense of togetherness.
What is a team? A body of people who hold regular meetings? Who are united in purpose or role?
I believe a team is a body of folks united in achieving a goal for which they each hold both a personal and a group stake.
Like mentoring (and Suzanne's comment on the previous posting), you can't truly participate if you have not articulated why you're doing what you're doing for yourself, your participation and contribution won't be as effective.
But what do you think?