Starfox64x on youtube is doing a compilation video project documenting everypony's stories on how they joined the herd and became the brony they are today.
http://www.youtube.com/watch?v=xt66Q1D_O7g&feature=player_embeddedLinky above to his video. I'll try to participate in this and I encourage other bronies here to do so as well. All the info you need to know is in the video so go watch please.
