n. A person who spends a great deal of time either surfing the web or fussing with their home page.
2002
Revenge of the arachnerd. When Spider-Man debuted in 1962, he was unlike any superhero who had come before and the new film reportedly clings to Peter Parker's foibles and vulnerabilities.
1996 (earliest)
The Websurfer's Handbook is a growing dictionary of facetious Web terminology, ie: "arachnerd, n. Someone who spends way too much time weaving and climbing around in the web. (If you've found this page, you probably are an arachnerd)."