Heather,
First of all I'd like to welcome you to Origins Theology. It's a place where, as you've already discovered, theology or the Bible isn't the primary source of one's ideas or arguments, but science is.

TEs dominate, but there are a few of us YECs around just to make sure they don't step too far out of bounds.
I had to chuckle when I read this. I love your spunk, we could use you around here.
As far as your question here is a good answer from Answers in Genesis.
http://www.answersingenesis.org/Home/Area/AnswersBook/races18.asp
Here's an excerpt:
The Bible tells us how the population that descended from Noahs family had one language and by living in one place were disobeying Gods command to fill the earth (
Genesis 9:1,
11:4). God confused their language, causing a break-up of the population into smaller groups which scattered over the earth (
Genesis 11:8-9). Modern genetics show how, following such a break-up of a population, variations in skin color, for example, can develop in only a few generations. There is good evidence that the various people groups we have today have
not been separated for huge periods of time.
The rest of the article is very interesting and worth your time.
Once again, welcome, stick around you'll find out things about your fellow Christians you never knew or thought of before.