Google's Santa Tracker website shows you where Santa is, how many gifts have been delivered, and the distance he is from you. You can also get information about the various locations he's visited and play some simple games including one that teaches you the basics of programming.
Microsoft has once again partnered with NORAD for the 'Official NORAD Santa Tracker'. At their site you can also play games, watch movies, look at photos, and learn about holiday traditions.
If you're on your iPhone you can You can pull up Santa's location by searching for 'santa' in the Google Maps app. If you prefer an app based solution you can download the official NORAD Tracks Santa App from the App Store for free.