Psychiatric Times: Computer Addiction: What Is It? by Maressa Hecht Orzack, Ph.D.
Psychiatric Times August 1998 Vol. XV Issue 8

Tolerance, withdrawal and compulsive use are requisites for any diagnosis of dependency (American Psychiatric Association, 1994). Psychological tolerance is indicated by the need to spend increasing amounts of time on computer activities such as playing games, arranging files or participating in online discussion groups. Even though computer users are aware of problem behavior, they continue to use the computer compulsively. They often blame others for the problem. Withdrawal symptoms are indicated by an increase in irritability and anxiety when a person is unable to access a computer. Even though one investigator (Anderson, 1998) used a three-day abstinence as an indicator of problems, at least one patient has said that it is a matter of only hours before he starts to feel irritable, depressed or anxious.
For the Web surfer, satisfaction must come early, or the user will leave the site. Web pages are aptly named because of the many links attracting the computer user to new experiences, causing him or her to lose track of time. Patient D, who complained about the amount of time she spent online, said she could not leave the Web because the next connection might be just what she was looking for.
Life immitating blog?
I did notice the date of this post; it almost kept me from replying. Sadly, however, there are now (2008) several 12-Step groups for Internet Addiction…
At the same time there is an on-going argument amongst scholarly types as to whether Internet Addiction actually IS an addiction. As the developer of an online community with a membership base of over 30,000, I would state, unequivocally, that when compared to any other addiction (cravings, consequences, relationship and monetary loss) Internet Addiction is very, very real.
You can find more info at sites such as http://treatment-hotline.com and http://dual-diagnosis.newportharborrecovery.com
Note: The original post from Aug. 2006 used data from 1998 as its primary source. Since then, much more has been established and verified in regards to Internet Addiction. There are even multiple Internet Addiction 12 Step Groups…
Thanks…
JJH