Ultrasound

We are going to having our first ultrasound on Thursday. I have heard of people going but am not sure what to expect. At Wikispaces it indicates that an ultrasound looks for the following:

Date the pregnancy.
Check the location of the placenta in relation to the cervix
Check for the number of fetuses.
Check for physical abnormalities.
Assess fetal growth.
Check the sex of the baby.
Check for fetal movement, breathing, and heartbeat.

We were talking last week with a relative that has a newborn about finding out early the sex of our baby. She told us that she did not want to know because it gave the birth day that much more excitement. At first I thought that I wanted to know but I think I want to wait as well. At this point we believe that this is what we will be doing.

Below you will find some information on ultrasounds:

Girl or Boy Quiz
Fetal ultrasound: What can it tell you?
A real 20-week ultrasound (Watch ultrasound videos)

What do you think about finding out through and ultrasound about the sex of a baby?