About: Matt Denman

To clarify, I have an external system that has its own security and user names. I am trying to sync the two, such that when a user registers with s2Member on the site, I can create a new user for them on the external system.

The external system has its own minor rules for valid user names. I have a web service I can call to check to see if a user name is valid, which is what I want to call via ajax from the web page during the blur event of the user name field.

I think the best option would be to have a way to check wordpress for the user name being valid at the same time I check the external system. I would only show the “good image” when both wordpress and the external system say the desired user name is valid.