Yep. I never mention it, but my secret guideline for spotting a xNIX newbie know-it-all is if they claim their Linux machine is 'secure' from unauthorized use or contact.
Instantly, I know that this person is some goofy convert from Win9x who's managed to load RedHat (that they got from Best Buy) on the consumer Hewlett Packard that mom bought them last Christmas.
REAL Unix systems do not run on PC hardware. End of discussion.
Within five years or so, a large proportion of the UNIX world will be on 64-bit Intel and AMD. Even Sun is porting Solaris to Itanium, just in case.
And AMD's SledgeHammer isn't going to do SMP--it will do 8-way NUMA.
Unix boxes can be secured to C2 level. The spec is called the Orange Book by the people that do that kind of thing for a living.
/john