vjoon K4 Publishing System

What is K4? I heard about this publishing system recently and wanted to learn more. K4 is produced by vjoon, a company based in Germany that creates publishing solutions. This system is primarily for publishing content for magazines, newspapers, business reports, and books, both on and off-line. While K4 appears to be a solution targeted at major media companies (and is too big for the smaller company I work for), it has piqued my curiosity. Read more about it at www.vjoon.com. Have you used K4 before? Let me know your thoughts!