It would be nice if the context popup menu of packages/folders of a project had something like "Import File..." which the user could use to locate a .java, .jsp, ... file somewhere out of his/her project directory and import it to his/her project.
Of course, IDEA could let his wonderful AI engine (or whatever you call it) to perform things such as renaming the package name of the .java file, etc. on the fly.
Or is this feature already present in IDEA? Today a coworker of mine asked me how can he add an external file to his project without leaving IDEA and I couldn't find a way just to do it...