Based on further discussions at http://groups.drupal.org/node/15388 and related to #315035: Add jQuery UI elements to core, I propose we move the jQ module into core. This would allow administrators to easily and quickly determine what jQuery plugins are installed, and their versions. It also would allow them to turn on or off certain plugins from the same screen.
The API would allow module maintainers to specify supported plugins with a hook_jq function in a MODULE_NAME.jq.inc file. Modules would invoke plugins with jq_add('plugin-name', ...). (We could simplify this to simply jq() if desired).
I'll roll out a patch tomorrow, and add some screen shots and instructions for testing.