I found this article in iVillage:
What could be more fun than trying to guess the sex of your baby-to-be? Everyone wants to get in the game. Don't be surprised if someone you've never met stops you at the grocery store, offering a prediction of your baby's gender. For hundreds of years, expecting moms have relied on time-tested methods of guessing their baby's sex. Even though these old wives' tales are far from foolproof, they are certainly more fun than their more reliable successors, amniocentesis and ultrasound. Enjoy guessing your baby's sex!
It's a boy if:
You didn't experience morning sickness in early pregnancy
Your baby's heart rate is less than 140 beats per minute
You are carrying the extra weight out front
Your belly looks like a basketball
Your areolas have darkened considerably
You are carrying low
You are craving salty or sour foods
You are craving protein -- meats and cheese
Your feet are colder than they were before pregnancy
The hair on your legs has grown faster during pregnancy
Your hands are very dry
Your pillow faces north when you sleep
Dad-to-be is gaining weight, right along with you
Pregnancy has you looking better than ever
Your urine is bright yellow in color
Your nose is spreading
You hang your wedding ring over your belly and it moves in circles
You are having headaches
You add your age at the time of conception and the number for the month you conceived and the sum is an even number