[Kronomancer]

Thanks - this is a good plugin. I find that it works okay with 3.6 beta 4.

One feature I would really appreciate is setting permissions to allow members of a particular usergroup invite new users to a particular usergroup. For example, as administrator, I would like to be able to invite collaborators to register, after which they would automatically be upgraded to a group with private access to workgroup areas. Or for other (non-administrator) workgroup members to invite other colleagues to join the same group, etc... with vB's powerful permissions system, it opens up many options for where you could take this invite system.