My plugin, CA-Credits, is now updated to version 0.5. The main improvement in this release is the formatted output support. Also, you’ll no longer need to call WP’s comments_popup_link function separately since CA-Credits now able to do that for you

Changes since last version:

• add $list parameter to customize each commentator list format
• add $max_length parameter to define max comment content length (0 for unlimited)
• add keyword %num_comment%, %num_trackback%, %comment_link%, %comments_link%, %comment%, %comment_link_text% for more control to formatted output
• add support to formatted output, incl. $before, $after, $delimiter, $before_last, $list

Version 1.0 will soon available with support to random output format and admin interface.

For direct download, installation, and more detail information, visit CA-Credits page.