We won't go into what exactly makes one a geek here (hint: it has something to do with knowledge, learning, books, skills, and technology, but not fandom). If you are it, you know it. And if you're looking for it, you know it. So here's some pointers to places where the original geek culture is still alive.
Where to find geeks:
* Advogato - Just celebrating its tenth birthday, Advogato qualifies by virtue of being one of the oldest social sites on the web, and by having its original focus be on technology first. Why should we look for older sites when finding real geeks? Because early in the technology adoption lifecycle, the innovators are the geeks.
* DeviantArt - It looks like I'm breaking my own rule here already, doesn't it? But I'm not. I am not saying that all artists are geeks. Rather, geeks and artists may sometimes overlap. Especially if you look towards digital art, such as 3D graphics and CGI. DeviantArt has an unusually high concentration of geeks, partly because it started out hosting skins and theming packs for software.
* ElfTown -
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