[@netweb Keymaster 14 years, 2 months ago]

You could create a new role called “Supporting Members” and give these members the same permissions as the bbPress role ‘Forum Participant’.

This would only change the text displayed under each username, it would not give them a badge or image displayed next to or under there avatar etc, for that you would need to write or download a plugin that supported this for bbPress (I cant think of any that do this at this stage).