Many users wrote to alert us that KDE 4.0 has been released. Here's Computerworld Australia's take on the release KDE 4.0 is based on the Qt4 toolkit, which brings significant enhancements in the way memory is used. "So it ends up making KDE less resource intensive than KDE 3, which is quite an improvement," according to Australian KDE developer Hamish Rodda, who calls the new architecture "future-proof." Computerworld notes that developers are already at work porting the new environment to Windows and the Mac.