Two good sites on KM to check out:
1)
www.kravmaga.com
This is the website for the KM National Training Center in the US, which has branches throught the country. It looks a bit slick and corperate, and stresses the fitness aspect as much as the SD training, but hey, at least in the US, cardio kickboxing-type classes get alot of people in the door that would never go to a dojo otherwise. Many dojos are offering a cardio fitness class these days, and that is what is keeping them open for the serious martial artists. The actual KM classes are quite a workout in and of themselves. They stress physical fitness and also want to push you physically and mental past self imposed limits, in addition to teaching you to fight effectively in less than ideal states.
2) http:/www.industrialgothic.com/safety/kravmaga.html
This is a really informative site about the history, philosophy, and techniques of KM I came across.
Hope this helps.