We do have plans to add a User area to our website, but that functionality is a ways out.  What we plan includes:

• individual user logins, giving access to order history, order status, managing mail list subscriptions, contact info, etc
• discussion forums for topics related to our products and product plans
• a marketplace for users to buy/sell used GT products from each other

As we get closer to developing this functionality, we'll let you know on Facebook and ask for your ideas.