Geek, Nerd or Dork?

(thanks to John Deeth for the image)

I've seen these three terms used interchangeably, and while I've always known at the back of my mind that they have differences in meaning, only now did I go out of my way (read: Google) to find out exactly what they mean.

Well, not exactly.  As they are slang terms, there's no formal official definition. There are variations in the meanings depending on the source and usage (see below).

Nerds - in general, technically bright but socially inept (Whatis.com).  A nerd per se likes knowledge more than the average person, but has difficulty dealing with people. When used in this sense it tends to mean a way of life and a love for knowing things.
_____  nerd -  Means a specific kind of nerd. For example, band nerds (as in marching bands) and word nerds (like David Cook).  But when used in this way, using "_____  geek" instead of _____  nerd" would usually result in the same meaning, whereas the prefixless usage would usually be more distinguishable.

Geeks - In computers and the Internet, a person who is inordinately dedicated to and involved with technology (Whatis.com). Some would say these are simply nerds specialized in technology, but then in this usage the term "geek" does not carry the "socially inept" connotation as much as the term "nerd" does.  And lately it seems there's more respect for geeks than for nerds, and it's more of a compliment to be called the former than the latter.
_____  geek - When used in this way, the meaning changes considerably, and usually becomes indistingiushable from "_____  nerds."  For instance, Star Wars geeks know everything there is to know about the franchise that sometimes it affects their way of life, and this results to them being outside the mainstream.

Dorks - It seems there is much less uncertainty in what this term means. Aside from the rare instances where it could be an endearing term, it's generally an insult to be called a dork.  Dictionaries say dorks are stupid and dull, and some sources add that dorks actually think they are cool.  However sometimes it's fun being around a dork because they don't take themselves too seriously, and it's common to see people act like dorks just for the laughs.  But then some dorks have so low EQ (aka Emotional Intelligence) that it's hard to not be irritated by them.