Chris Hatch kindly split infant clothing into Boys and Girls. I guess if people say it can't be done enough, someone will eventually get around to doing it!
http://www.insimenator.org/index.php/topic,110261.0.html
In addition, he's made skintones with separate textures for boy and girl children and toddlers:
http://www.backalleysims.com/adult_forums/showthread.php?t=1453
Warning: Back Alley Sims is an adult site.
Check out my baby clothes!