Custom URL Link For Entry Titles?

Hmm, does anyone know of a blogging service or application that allows you to insert your own URL link for the title of an entry post? The only one that I can find that has this ability built in from the very start is Radio Userland (which offered this years ago when blogging first took off). It can be done with WordPress as well but you need to modify your various templates to do it in combination with a new custom field. I’ve searched Drupal and Textpattern as well but didn’t see anything related to such a feature.