I'm trying to see if there is a way to change a new users roles/perms on signup. It appears there is not currently an easy way to do this so I started to look into the developer docs to see if anything is possible from there even though I have never done any MT Plugin work before.
The table of contents for events and callbacks looked promising when I saw "New User Provisioning" but was confuse when I went deeper:
http://www.movabletype.org/documentation/developer/callbacks/new-user-provisioning-1.html
If I was versed in Plugin Development would this be helpful to me? I'm guessing this is just a stub. If that is the case, when and if will it be updated?
Reported on Movable Type 4.3
It would tell you what the callback's name is so you could attach your own code to guide the user provisioning process.