If your site is using invitations, you can now have the invitation requests sent somewhere other than [email protected] (which was previously hardcoded onto the login page).  To set an address add a line like this:

   System.invitation_request_email = '[email protected]'

to your wagn.rb file.  (Note, we're planning to improve user signups significantly in Wagn 0.6.0; this has been due for a while now...)