This is an interesting read from the folks over at lwn.net. With the majority of Linux kernel code coming from paid developers, does this not sound like the community source model that Sakai and Kuali implement? 
There really are thousands of developers – at least, almost 2,000 who put in at least one patch over the course of the last year. Linus Torvalds is directly responsible for a very small portion of the code which makes it into the kernel. Contemporary kernel development is spread out among a broad group of people, most of whom are paid for the work they do. Overall, the picture is of a broad-based and well-supported development community.
