I don't have many fla's, so here is what I have:

Original NG - This is the original preloader that was used for years.
Deadlock32's preloader (2004) - Stamper updated the layout, deadlock32 made a preloader.
NG 06 Preloader: New tank same old button (as orginal)
Rock Out : Official preloader for the Rock Out contest.
Madness Day 07 - Preloader for Madness day 07 (duh)