This website from the National Highway Traffic Safety Administration is the government's official website on distracted driving. Be sure to check out the Get the Facts tab for statistics and other useful information. For specific information on texting and driving, visit the NHTSA's Texting and Driving Prevention website at http://www.stoptextsstopwrecks.org.
This guide from the FCC provides statistics about distracted driving and links to many additional resources. Don't miss the Distracted Driving Information Clearinghouse, which has links to many reliable websites containing information on distracted driving.