A stand-alone Order Tracking page for your users which requires an Order Number (mandatory field) and one of the three fields - Billing Postal Code, Billing Last Name or Email Address and displays the shipping tracking information (hyperlinked appropriately) if available for the order specified. It does not require the user to log-in.
The Order Tracking page can be completely customized to suit your needs and complete source code is included. It can be customized to require all three optional fields or none of the optional fields. Look at the stores below to get a feel as to how each of these stores are running a customized version of the Order Tracking page.
Screenshot:
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See it in action at the following Stores: