How does one define Internet addiction? It might all come down to perception, after all, but consider this: According to this article in Mashable.com, over half of Internet users actually confess to feeling thier use of it is within the realm of addiction. And maybe they're right. After all, it's tempting, always available, immensely satisfying, it changes the chemistry of our brains significantly, and we absolutely can't imagine living without it. Sounds like an addiction to me.