That commercial rocks. Great timing, with the SCO thing, too.
As for PR, commercials don't build PR. Word of mouth does. And linux, above all else, has GREAT word of mouth. I can't say I've ever heard anyone who actually uses linux badmouth it.
Hrm, Servers. Fun little things. Even Sun is making Linux-based servers now (I happen to own a Cobalt RaQ3, which is one of the aforementioned servers). The problem, so far, is that very-very specialized hardware (E10K, et al) cannot run an OS that isn't very-very proprietary, without losing a great deal of functionality. For instance, there is no linux tool to disable a processor board to allow you to hotswap processors in the SUN Enterprise and SunFire series server cabinets.
Also, in response to people-using-linux-at-home comment, I don't think that's really practical. People who're newer to computers don't want something that looks difficult. They don't want to ever, EVER see the back end of things--it's scary. And those who wouldn't be frightened off by such messages, probably already use linux, to some capacity or another.
Though, I suppose I'm not the best person to ask about such things. Most people probably don't have a 1U and two miniATX towers running linux, and a SPARC running SunOS.
Anywho. Yay linux.