No, I'm not really either but have been using this a bit to track where boats are around the world:
http://www.marinetraffic.com/ais/
You can see Cruise Ships, Yachts etc..
I went sailing around the Stockholm islands last week and it shows our exact route from the whole day.
Edit:
Infact, it still shows our 2nd day of sailing now:
http://www.marinetraffic.com/ais/default.aspx?oldmmsi=310330000&zoom=10&olddate=8/10/2010%201:30:59%20PM
http://www.marinetraffic.com/ais/
You can see Cruise Ships, Yachts etc..
I went sailing around the Stockholm islands last week and it shows our exact route from the whole day.
Edit:
Infact, it still shows our 2nd day of sailing now:
http://www.marinetraffic.com/ais/default.aspx?oldmmsi=310330000&zoom=10&olddate=8/10/2010%201:30:59%20PM