I'm not completely sold on the notion of "Internet Addiction". Completely untrained in psychology, it seems to me that this kind of "addiction" is more of a compulsive disorder than a real mental/physical dependency.
For those of you that disagree, check out the reSTART Internet Addiction Recovery Program. You can follow them on Facebook, Twitter, LinkedIn, check out the YouTube video channel and read their blog. You can take a Virtual Tour (how convenient) and take an online survey too. If you weren't addicted to the Internet and social networking before visiting the site, you surely will be after connecting to them in a gazillion ways! Then, you can visit the pleasant villa to get cured!