We used to have llvm/www/docs/*, now we don't. What we _really_ want is to have a llvm/docs directory in LLVM CVS, with the up-to-date versions of the CommandGuide, Getting Started Guide, etc. Whenever a new version of the file gets committed to LLVM CVS, it should be auto-uploaded to the "current" section of the web page. Whenever a new LLVM release is made, these files are cloned into llvm-www/releases/(version)/* files, so the state of the documentation as of a particular release is always stable going into the future.
Documentation is now back in LLVM CVS tree under docs/*, it is also in the same place on the web. The web pages have been moved out of the CVS tree.