[e-Newsletter] Description for Member Groups

I’d like to see a description associated with Member Groups, so that in the display of groups for subscription, the user can see what the groups are about.

I’d be happy to add a custom field to the CPT and to modify the code to display the subscription form. I would also modify the shortcode to include a parameter to show the description. So if WPMU DEV doesn’t want to do this, guidance for a DIY solution would be appreciated.