This is a nifty little tool. Simple Tracking
offers a way for you to track your holiday packages with RSS. Simple Tracking will let you plug in any UPS, USPS, FedEx or DHL number and it will either let you generate an RSS feed or immediately display your tracking information. I don't have any outstanding packages right now so I can't play, but if you're buying a lot online this holiday season you can give it a go.