Linux mastermind and all round ubergeek Linus Torvalds has recently admitted that he does not even own a PC at all now. The brain behind the Linux Kernel says that his main machine these days is a dual 2GHz G5 (aka PowerPC 970). Its running Linux of course, so if it could really be described as an Apple anymore is a little debatable. Despite his Mac owning status, Torvalds has made it clear that there is no platform bias on his part as Linux supports 20+ architectures.
"As to the why ... Part of it is simply that I wanted to try something else, and I felt like there were enough people testing the x86 side that it certainly didn't need me. Part of it is that I personally believe there are two main architectures out there: Power and x86-64 are what _I_ think are the two most relevant ones, and I decided that I had to at least check the other side of it out seriously if I really believed that." - Linus Torvalds.