Yeah, I have the 300 trailer to blame too! Well, kinda...
It was actually a spoof of the 300 trailer someone made using Halo(the game) clips that I saw on a gaming site. I liked it so much I downloaded the orignal trailer onto my mp3 player and used to watch it on my lunch breaks at work (helped me get through the day...). Someone on the website also asked about the track, and someone else posted that the song was Just Like You Imagined by Nine Inch Nails, and how they were the most underrated bands of all time.
I thought I'd check em out, but never got round to it. Couple of months later I was downloading discographies of my fav muscians, and I heard a live performance of Linkin park where they covered Wish, and they said it was a song by Nine Inch Nails. For a while I kept thinking "where the fuck have I heard that name before?" I downloaded the entire NIN discography and started listened to the older stuff, and thought it was shit, but some of the newer stuff I liked (mostly stuff from With Teeth and the Fragile). Over time, I've aquired a taste for the older stuff (I guess I "get it" now), and there's not many NIN tracks I dislike (except for remixes ofcourse)
I'm 24 now and this was about Late 2007 I think. I believe Year Zero was out by then, but it wasn't in the initial discography I downloaded, so I knew nothing about it until a couple of months later. And then it was about May last year when I decided to start checking out the NIN website, and downloaded the Slip and Ghosts.
I've also been converting friends and family to NIN! Some of my friends knew about NIN long before I did, but thought they had died out, so I kindly sent them links of The Slip

My sister got into NIN by hearing some of the remixes I used to play.