I was asked yesterday by a website owner if it would be possible to discover where his users were coming from using IP addresses and redirect or show them different content accordingly. I remembered that I had accomplished a similar task only a few months ago using Maxminds geo locating data file to overlay on Google maps showing the location of peoples IP addres and providing reverse look ups of hostnames etc.

Note: if anyone would like this script just leave a comment and I will try and dig it out.