As testament to Red Hat's active participation in the upstream Linux kernel community, through the course of 2.6 development more patches were accepted from Red Hat kernel developers than from any other company. During the past year, more than 4,100 patches from Red Hat employees were integrated into the upstream 2.6 kernel.
http://www.linuxjournal.com/article/8074
Im sorry where is the part about 'hundreds of developers'