If anybody here has ever played Counter-Strike: Source or any other Source-engine game, you will know and love/hate surf.

WELL! I finally got around to learning GTKradiant, and created a neat little demo map based on surf in CS:S. I can get most of the functionality, but some things about player movement couldn't be replicated. I'll post the map in a minute.

It absolutely will not work without a specific set of variables.

sv_airaccelerate 100(0)
sv_friction 3
sv_maxspeed 200 (400 worked, just not as well)

Also, due to Quake game mechanics, you have to be looking away and down from the ramp (like a step in strafejumping). This keeps you from flying off the top of the ramp.

http://www.mediafire.com/?sharekey=7560 ... b9a8902bda
(hope that's the right file, all textures/ents should be included in nexuiz base)
http://www.mediafire.com/?sharekey=7560 ... b9a8902bda
(BSP file, if you don't have radiant... I don't know if that's enough)

Pics (yah, I know it's not much):

And perhaps an explanation for those of us that have no clue what you're talking about?

As far as I am aware for Surf you have to stay on the very slanty piece of terrain without falling off and hitting the void.

I'm sure there are plenty of videos of it.
search for "surf Counter strike" or "surf team fortress" and you'll see some examples of complete maps, and surfing technique.