Raven's Rick Johnson updated his .plan with a reaction to feedback they've apparently been receiving about player movement speeds in the just-released Soldier of Fortune Demo. Word is a new cvar to govern these speeds will be created, which sounds like it can be run on the server side, as he mentions plans to demonstrate this on a server, possibly as early as this evening:

Whomever said we don't listen...

Based upon feedback of the DM players, we are going to add a cvar which controls (on the server) how fast movement rates are. So you can scale down the movement rates to whatever rate you desire. Few other things we are going to add: cvar to allow you to set a frag penality if you kill yourself and a dm flag to say that you only want bullet weapons in a level.

Sometime this evening, I'll bring up a demo server with the slower movement rates, so that you can judge it for yourself.