Well, I'll tell you. This could mean chatting on irc or icb, playing multi-user games, posting to alt.sex.bondage.particle.physics, or even writing shareware. Most geeks are technically adept and have a great love of computers, but not all geeks are programming wizards.
Geeks are generally social outcasts from mainstream america.
The ranks of geekdom are swelled with gamers, ravers, science fictions fans, punks, perverts, programmers, nerds, subgenii, and trekkies. These are people who did not go to their high school proms, and many would be offended by the suggestion that they should have even wanted to. Geeks prefer to socialize with other geeks, the self proclaimed weird. Therefore they go online to organize parties, food runs, drink runs, and movie nights, and be assured that their companions would rather talk about superheros as modern mythology than the latest football scores. The community accepts people from all walks of life, assuming they have access to the net and the skill to use it.