Control page cache on menu item level

In basic the idea is to make it possible for each menu item in the hook_menu(), to define if the output of the callback function should be cached with the page cache or not. Right know is every page cached for anonymous users, and this is working fine in most cases, but know and then i miss the possibility to disable the caching for a page that are dynamic for anonymous users. The caching should of course be enabled as default, and the setting is not ment to be available in the menu administration - only in the hook_menu(). I know that i might be possible to overwrite the page cache setting stored in the global array in hook_init(), but this is more just a "quick and dirty" solution to the problem.

Let me here what people thinks.