For those who haven't seen it here is another nice site if you live in Florida to go along with the previous sites mentioned..
http://www.floridabicycle.org/rules/motorist.html I have been giving out the little book "Street Smarts" that you can get from them and I have found out that people are totally ignorant of the laws about bicycle.
I can see just tapping the horn to let me know that they are going around but to lay on the horn is something else and also when riding I have noticed that bicyclist like to hug the right side of the road, you'll get more respect by taking the lane more, moving to the left, and acting like a vehicle by obeying all the traffic laws..Cheers.