Official release for Drupal 6. The module has an updated list of dependencies (search and profile modules), as well as instructions for removing the Users tab from the search page - changes in the theme system for Drupal6 broke the original method.
This is the initial release for Drupal 5.x. Username and multiple keyword searching has been added with this release. Please note that there are installation instructions in the README.txt file. One new installation requirement is the addition of some code to the template.php file of your theme, that removes the default "Users" tab from the search page. If someone knows of a better way to do this from within the module, please let me know.