This plugin by nuprn1 allows bulk editing (manual activate, resend activation key, delete user) of pending user registrations on a single (non-multisite) WordPress installation of BuddyPress
This plugin will NOT work for a multisite/network WordPress install – intended for single WordPress ONLY – for the moment.
Plugin homepage: http://blog.etiviti.com/2010/10/buddypress-pending-activations-plugin/