Just send your request to press@portalprelude.com.
Your message will be transfered to the person in charge of the communication.
Just send your request to mirrors@portalprelude.com.
Don't forget to include the following informations:
Just send your request to team@portalprelude.com.
Your message will be transfered to every member of the team and you could even get an answer from each one.
Take a tour on the Portal: Prelude Team page, and pick the e-mail address that interest you the most. Please note that members may not answer your question if they do not have the time to do it.