Well,
I just read that news in our local newspaper...
I don't know... but maybe in the future, NASA should make an automated method that would prevent such problems/craches...
I don't know so much about how should it work, but if they can find a way that would calculate the space between each satellite, and if the space is so close, then a program should run... that program would automatically change the path of the satellite to prevent the crach.
Does it make any sense?