I think Trekkie is more than just being a fan. I'm a fan of NCIS, Good Eats, and American Idol. But, I don't buy their books, go to their forums, or think about the universe defined by those shows. OK, I do on one book on kitchen gadgets by Alton Brown. Maybe I should add...
0 - Visit Start Trek forums frequently, buy books, and have the DVD's.
Yeah, see, this is what I was thinking - being a fan means you like Star Trek, but being a Trekkie requires more interest than that. It's a certain way of thinking, I guess you could say. I think that when you want to involve yourself in more than just watching the show, that's when you could be considered a Trekkie. I think you have to love the SHOW first and foremost though, the movie is more of a fan interpretation of the show in my opinion.