Application Server that Allows Separated Content?

Aceticon asks: "I've been looking around for a Web Server/Application Server/Whatever solution in which the content and the presentation are separated enough to allow a designer (which at most knows HTML) to create and adjust the presentation side with minimal support from a programmer. On top of this, the solution should be scalable enough to work from a Windows NT (maybe/hopefully Linux) serving 10000 pages/day enviroment to a Sun HPC Server (or similarly sized beast) serving 1000000 pages/day. Things like XML/XSL seem unsuitable for the whole 'designer with no support' thing - encoding presentation using XSL sheets is a refined form of masochism. The scripting solutions i've seen out there are either too techie-like (PHP), or non-scalable (ASP). Anything that needs recompiling is probably a bit too complex for somebody whose not expected to have programming abilites. Any ideas?"