Raven's Rick Johnson updated his .plan with word that there will in fact be a Linux port of both the Soldier of Fortune client and server, as well as a quick note about, "a major AVI" they just finished up. It's a small update, so here it is in its entirety:

** Big SoF News **
There is going to be a Linux port of both the client and server. Unfortunately, because of the lateness of this decision, it will not be ready by the time the game ships, but will be available to download as soon as it is available (hopefully within a month of release).

We have completed a major AVI and will be releasing it very soon.