Is Yahoo! moving from FreeBSD?

[Freminlins]

"But in December, Yahoo started to port its homegrown infrastructure
applications from its custom operating system to Red Hat Enterprise
Linux 4.0, which was in beta at the time and was released last week.
Plans call for a gradual migration of more applications to Linux, but
the timing and number will depend on how successfully the early work
goes, Ng said."

http://www.computerworld.com/softwaretopics/os/linux/story/0,10801,99901,00.html