Just a quick plug for Santa Tracker HD one of Onteca's flagship Apps. For this year's version I was asked to do a flashy 3d globe which Santa zips around at several million miles an hour delivering presents.
The app also has sightings, and advent calendar, an entertaining blog written by Santa himself, and lots more. You can get it for iPhone/iPad from the App Store. Search for Onteca + Santa and you should find it no problem.