I would urge you all to go and have a look, and you will be horrified at the amount of data held on you on that site - who lives there, telephone number, how long you have been there, amongst other things. It even has your previous addresses and who lived there with you. As far as I can gather, it is information from Electoral Rolls from before 2002. That is when a box appeared on the Electoral Roll form, allowing you to opt out of appearing on sites of this kind or allowing your details to be sold.
To get this information removed from public viewing, you need to go to http://www.192.com/downloads/C01.pdf and download this form, fill it in and send it off. Mine is already in the post.