You might be a geek if giving pointers means something completely different to you. : )
You might be a geek if this guy is one of your best friends
You might be a geek if you are able to derive my age from this photo of soda cans.
Hint: http://goo.gl/2aHu
You might be a geek if this is your kind of camp fire story.
You might be a geek if you have ever cared about open source.
You might be a geek if you argue the distinction between geek and nerd

You might be a geek if you think this ASCII Star Wars movie is the bomb!
Open terminal and type:
telnet towel.blinkenlights.nl
via @adactio
You might be a geek if this quote about software engineering hits home with you.
Engineering is the art of modelling materials we do not wholly understand, into shapes we cannot precisely analyze so as to withstand forces we cannot properly assess, in such a way that the public has no reason to suspect the extent of our ignorance.
- Dr. AR Dykes, British Institution of Structural Engineers, 1976.

You might be a geek if you have ever gotten into a discussion with someone about spaces and indentation.