Charles - Meh, You are either doing something offical or you wanna report a faulty phone, in either case get lost!
Charlie - ... You knew me at school, right?
Fionacat - You probably know me from furrymuck or mebbe livejournal, dunno which but you don't know me that well yet.
Fee - Ahhh, furry type hunh? Well that's cool.
Flo - Chica, fluffy kitty girl
Fi - A few furrymuck peebs, not many. I know you =)
Runt - You know me IRL or from the very cool irc server wtower.net
Squeeky - You know me from IRC in the form of fur.net
Mike Montet - Woah, you remeber me from living force, did I heal you with a 34 on my treat injury roll?
Feeyonah - You can remeber Gary's D&D game, now you worry me.
Waif - You know me off Sporkmuck
Bryson - You know me off Pokemush, if you can hit the operators there I might be able to get back...
Other names I've been known by, mostly roleplaying games;
Fox (Vampire), Toes (Vampire), Mael (Vampire), Squanda (Underworld), David Vasquez (SLA Industries), Genki Long (Feng Shui), Markus (D&D)
There's been others, but I don't recall them so good just now.