Who needs a tracking service when you can just hop on the USPS, FedEx, UPS, or DHL website (or whoever your carrier is) and just track? Maybe you. The Trackthis API integrates an amazing array of functions into your application. The API webpage lists over 10 carriers you can get notifications for.
A long time wishlist item for ProgrammableWeb was rolled-out over the weekend: big screenshots for the mashups. Many readers had commented that having thumbnail images was nice but it would be much handier to have screenshots large enough to get a good sense of what the mashup site really was.