Hello, first off, great plug-in.
Just a heads up that with the latest BuddyPress 1.6 trunk this plug-in now triggers the following error:
Warning: in_array() expects parameter 2 to be array, null given in "/wp-content/plugins/buddypress/bp-core/bp-core-caps.php on line 414"
This error only appears when a user is logged in and has the "Moderator" role assigned (i.e. it doesn't appear for admins, editors, authors, subscribers, or any other built-in role). The error shows in the comment admin and comment stream and repeats for each comment.
I know plug-ins conflict, but since BuddyPress is a pretty common one and is due for a big update soon I thought it was worth notifying you.