I think this plugin is wonderfull and exactly what I need for my site!
Anyway there are few glitches that alone make it unusable for me.
I want to create users on the back end and let them login using the just their email, without having to manage passwords. The problem is that the plugin hide the password box in the new user page, but then wordpress ask for a password anyway to complete the user creation.
So I cannot create users!
This problem prevent me from using your plugin.