I have just come across a really cool way to track your website visitors. If their company has its own IP address, which more and more have as they have proper networks installed, then you can see who they are (within reason). Its called Leadlander and I have an article about it on our new website soon to be released. To keep upto date on the expected launchdate for our new website please send me an email on email@example.com.
This can help to track your web visitors activity, help with your outbound marketing and see what search terms they have used.