I made a new Drupal 7 module today... the CTools Path Access plugin. It is a very simple module that provides a CTools access plugin for using the access rules of another path.
For example, you might set up a custom Panels search page in Page Manager, and just want to use the same access rules that the default Drupal search page uses at
I have submitted the plugin as a patch for CTools itself, but until anything happens with that, it is available as a standalone project. I have only written the plugin with Page Manager in mind within a Drupal 7 environment - I will look at a 6.x backport and compatibility with other modules that use CTools access plugins if demand (from the community or myself!) exists.