I’ve found http://lesscss.org/ so interesting! It is a good way to improve reuse of elements in css, but I don’t know how to integrate it with Visual Studio 2008. (it would fit nicely with asp.net MVC, for sure)
Do you have any idea for what I need to do in order to recognize and compile .less files inside VS?
Integration beyond simply being able to invoke an external command line based tool would be a significant task. For simple integration consider using the following guide to write a task which invokes the lessc compiler on the file.
Integration at the intellisense level is a massive undertaking for someone not deeply experienced with both the css/less syntax and the visual studio api.