If you have young ones around who are anxiously awaiting Santa's arrival (or old ones who join in the buildup), this is a fun way for them to track his progress. It's works best with the Google Earth plug-in, which is easily installed from the site. It gets a little better each year and our kids have a great time with it.
http://www.noradsanta.org/en/index.html
Be sure to check out the About Santa links (see how many cookies Santa has eaten so far).
I've got some little ones coming over later and will show this to them. Thanks! ;D