The issue is with the March 2009 SP1 SlimDX end user runtime installer (Gorgon runs this when it installs). Apparently it's not working, and even though I've tried to download it from the SlimDX site it still refuses to run (for me) and claims that the installer is invalid.
If you're having issues running Gorgon applications because it can't find the v126.96.36.199 SlimDX assemblies:
"Could not load file or assembly 'SlimDX, Version=188.8.131.52, Culture=neutral, PublicKeyToken=b1b0c32fd1ffe4f9? or one of its dependencies. The system cannot find the file specified."
Then install the SlimDX March 2009 SP1 Developer SDK from here and all should be well again.