The space on the server would more than likely at least triple, ifwe start exporting meta tags, or any other html formatting.
So that the user doesn't have to choose, what could be done is within the export process, adjust all links on the exported page to *point* back to their corresponding dynamic page. So that say a user reads a message in a thread that is that of a static html page, when they click *next* to see the next message in the thread, they will actually be using the php version and not the exported html version.
You want the users to use the php version because that is the system that is *always* up to date (especially if the static html files only get generated say once a week), and second, when they use the php version, they get to experience all of the dynamic features of the system (updated news, new mail messages, etc).
So the objective should be, generate static html files for the sake of search engine indexing, once the user has accessed a static html file, get them back to the php version as quickly as possible, and make the transition seemless.
= Jim =