Here are some great links for information on Pascal's Triangle:

http://forum.swarthmore.edu/dr.math/faq/faq.pascal.triangle.html:
Ask Dr. Math about Pascal's Triangle. This site has some great information on what the triangle is, and how to use it.

http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Pascal.html:
This is a more extensive biography of Blaise Pascal and what he accomplished in his lifetime.

http://members.tripod.com/absolutebow/ptri2.html:
This is a really good website with 10 different patterns. It is an excellent source if you are going to do a report on Pascal's Triangle.

http://www.shodor.org/interactivate/activities/pascal2/index.html:
This site has an activity with division for Pascal's Triangle. A great application if you are just beginning to find patterns in the triangle.

http://forum.swarthmore.edu/~ken/pascal.cgi:
Go to this site if you are trying to construct the triangle. Just type in the number of rows you want to see and the script will show them for you.