There is now an Oracle By Example (OBE) tutorial available for TPC. It takes you through a number of topics including, on the admin side, setting up teams and integrating with repositories and, as a TPC user, querying repositories and creating relationships and tagging items across repositories.
It assumes that you have already installed or have access to TPC on the server. If not, here are instructions on doing that. The OBE includes images and examples using JIRA and MS Project Server but for a tutorial on the Rally Software integration, explore their site
And, as always, give me your feedback!