Have Other Areas of Interest
Develop interests and points of conversation that are outside the realm of technology.
It is not that I don't enjoy technology. I would not have spent the time and effort developing those skills if I didn't. I'm the first to admit that I am a geek and proud of it. However, I recommend that your conversations take a far less binary tone when in mixed company.
In addition, if you are on the technical fringe, you must develop interests outside of science fiction and obscure collections.
It is not that I mind the obscure or the eccentric. In fact, these can be great personality enhancers if you have some other common interests, too. People will find you interesting and will be likely to remember you if you can mix general interests with those that are more obscure.