Chapter: How to get involved in the community team/its subteams

Some people want to contribute to the Rust project, but have no knowledge or interest regarding the technical side of the project. Right now, the way I'd see this is to just drop into the #rust-community channel and either ask or just lurk around until something interesting happens. It'd be nice to, as a part of documenting the split into subteams, also provide a detailed explanation as to how to:

1. Find a team
2. Contribute to a team's efforts without necessarily having the intent of joining the team (read: temporarily)
3. Join a team
4. Go beyond the community team into other areas of the project (this might already be documented)

This should be kept up to date with changing processes and requirements.