Hi Steffi,
I feel this is very important and required question in SCN. People are always discussing about SCN! SCN! SCN! I want to know what exactly they are looking for ? why they are running behind SCN? How they are benefited ? I need to know different view from different people. This will help me to know more about SCN easily without searching or reading through big books or article. 
Regards,
Hari Suseelan