Have you ever wondered why a person in your contact list appears offline to you all the time? Now you can spy your buddy to see his real yahoo status.If someone has blocked you on yahoo or is hiding from you by keeping himself or herself as invisible, you can track him/her easily. Although the tool which I am going to post is easy and simple to use but the side affects are many. Consider that you have tracked the person who is sitting invisible and you ping that person , and in return you didn’t get a reply, you again buzz that person, again no reply, you again……………and you end up with a bad mood and start figuring bad things about that person.
Well that was a bit of personal experience( I am sure you have judged that). Now without wasting enough time, I provide you the list of sites that will actually help you to track a person. These all sites work on the same platform, they just ping the yahoo or google or msn or aol server to check the status of the person you have enquired.
Related Links : Check if User is Offline or Invisible in Gtalk