I ordered RAM for my 12″ PowerBook from Crucial.com and I am tracking the package via iSnoot.net. The interface is dead simple with one field to enter your UPS, FedEx, USPS, or DHL/AirBorne tracking number. From there, iSnoot automatically determines the carrier and displays the past scans of your package, even displaying a Google map of where your package has traveled. To stay up to date on your shipment an RSS feed is automatically generated as well.
Hopefully my RAM will get here today or tomorrow so I can stop seeing the pin wheel of death every time I switch an application.