Ways to contact us:
Join the Zappos public API development community! Sign-up for the google group and you can read and send messages to the group mailing list: http://groups.google.com/group/zappos_api. This will often be the fastest way to get an answer to a question because the entire Zappos API team is on this list as well as other developers who may help you out. Don't be spammy. We'll beat you in Starcraft2 if you are.
You can email any questions or inquiries directly to us at firstname.lastname@example.org as well. Email us if you have issues with your keys, have a secret project you want to chat about and aren't ready to publish to the list, etc.