Programmatically Change Pager "Items to Display" value?
im not sure of any 3rd party module that allows easy "override the # of items per page". I've done this task a few times for View displays using core drupal apis.

Basically:


you use hook_views_pre_build to programmatically alter the view.
Use a custom variable to store your items per page value.
Make a simple admin page to allow a site administrator alter the value.


EDIT: amended to different views hook function.