teslatug writes "Channel9 has an interview with Bill Hilf of the Open Source Software Lab at Microsoft. Hilf argues that the majority of companies advocate open source solely so that they can drive customers to their core business, which is not open source. He calls this his 'donut theory.' Hilf also sees RedHat in this model, with support being their core. He compares this to dating, where you have to offer your date value in order to entice them. In his view, Microsoft offers developers a platform where they can make money selling their software. The virtues of 'free as in freedom' and the value of open source to the desktop users are skirted, but he makes an interesting point about big businesses like IBM and Oracle."