API documentation for 5.0

On api.drupal.org, there's documentation for 4.6, 4.7 and HEAD, but no documentation for 5.0 (or 5.x?).
With the changes in HEAD documentation for functions in 5.0 like menu_get_root_menus() is already missing ... which makes life for module developers harder than need be.

If this is the wrong place to post this, please tell me where to post, or who to tell ... or where I can get api-documentation for 5.0 ;-)