Don't repeat. I repeat: don't repeat.

I couldn't agree more. Why, by the way, buy books when so many interesting experiences are collected in such a small space.
Anyhow,I have seen the above rule being applied to the team too, which was not a good idea. Try to learn from the past by mixing up teams having different technology skills and different functional skills.
Build to Last (ISBN 0060566108) was an eye opener from an organizational point of view. A development department is no exception.

Tabari