On my business website I used a free tracker from:
Whos Among Us
It actually shows a worldwide map that is 'live' so you can see where visitors are when they are currently looking. That was also the one thing that stumped me - I expected UK visitors but got them from Japan, India, Australia......
Haven't really gone too mad on my site for a time, but it might be worth a look at this useful widget. They also do a paid for version - not sure if anyone has tried that.