All I want is to make it easier to create and edit the URL aliases for taxonomy terms (tags). I don't mind to think of a name myself, but I do mind the fact that it is such a pain to create the alias. If you add 3 new tags, it will take you 24 clicks or something.
I recently created (and contributed) the taxonomy_breadcrumb module (http://drupal.org/node/61944) that generates taxonomy based breadcrumbs for all node pages and allows admins to replace the normal taxonomy/term pages with regular nodes. The module adds a form element to the term and vocab add/edit pages where a user can enter a path. This path is not an alias, but a path each generated breadcrumb will link to instead of taxonomy/term/X. I realize the functionality in this module isn't what you described (you want an alias, not a redirect* to a node), it sounds like the type of interface you're looking for. It wouldn't be difficult add something to this module, or simply rip out what's useful to create a new module. * the term redirect is not being used in the HTTP protocol sense. Craig