I'm kinda in the same situasion at the guys above. I've forgotten username and password, all i remember is my email and my highest lvl character; Braakebein (lvl 60 troll hunter). I've made a fresh install of Windows on my computer a few months back and everything assosiated with Nostalrius is long gone.
Hope that an admin can contact me by PM to get it sorted out since many of my irl-friends and family have gotten back into the game!
Best regards & happy holidays