The About.com section on IBD and more specifically Crohn's disease has a lot of good basic information that is worth taking a few minutes to check out.
The main link for the the About.com Inflammatory Bowel Disease section covers Ulcerative Colitis, Crohn's and even some information on IBS. The Crohn's subsection has some great articles as well.
Crohn's Disease Freqently Asked Questions
Top Things You Should Know About Crohn's Disease
