Chick.
I’m a girl!
jrfranchi = Jim Franchi = Male
Sure now she tells me. 
http://boards.straightdope.com/sdmb/showthread.php?t=348563
I’m a man.
–FCOD
NailBunny = girl (altho somewhat of a tomboy)
(I wonder how we can get members who frequent other forums to know about and post to this thread)
OK, results so far:
Female:
Anaamika
Anastasaeon
Antigen
Chanteuse
FlyingRamenMonster
Good Egg
Harimad-sol
HazelNutCoffee
Kythereia
Ludy
MissTake
NailBunny
Rushgeekgirl
Susie Derkins
Tamryne
TellMeI’mNotCrazy
mlerose
percypercy
taxi78cab
twickster
Male:
633squadron
A.R. Cane
Agent Foxtrot
AskNott
Askia
CalMeacham
Colibri
Crafter_Man
Der Trihs
Dinaroozie
El_Kabong
FlyingCowOfDoom
Governor Quinn
Happy Lendervedder
Ice Wolf
Kid_A
Kilvert’s Pagan
MacGyverInSeattle
Marley23
Mbossa
Nic2004
Noone Special
Polerius
Priceguy
RandMcnally
Revenant Threshold
Roderick Femm
Rodgers01
Rysdad
Seven
Sunspace
Tengu
Twoflower
clairobscur
elmwood
interface2x
jrfranchi
matt_mcl
picker
silenus
whole bean
vivalostwages = female
I work with a guy named Sue.
Really.
“Sue.”
His nametag reads, “Sue.”
I think he’s from Thailand. He’s a rad tech student.
He should be studying law. 
PapSett- I am woman , hear me roar.
OK, maybe not. But I am female.
dbygawdcapn : rigged with a long spar
male
“I’m a man
Yes I am
And I can’t help but love you so”
Nature’s call: can open own jars, thank you.
I already checked in, don’t leave me off the list.
cherry: female
Let’s just say that I’m extroverted in at least one way.
Female
An old man.
Male.
Khadaji: Male.