Re: bazza @HCV - I don't quite get your point
FreeBSD is used in a commercial manner. It powers the NetFlix cache network. It is the basis of the Islion platform.
From the point of view of some commercial FreeBSD groups, Linux is a hobbyist OS gone pro and FreeBSD is a commercial grade/quality OS. I agree with them.
From a historical point of view, FreeBSD came from the commercial versions of Unix through the rework done by Berkeley (the BSD in the name). Linux was written by college student and spread out among the the hobbyist on the Internet. It was years later that Linux became commercial. Remember, SCO sued IBM at the turn of century claiming that it took something like IBM to make the hobbyist OS known as Linux into the commercial/professional OS that Linux has become.