Thanks for your interest @Rushster!
The "create user on login" function is part of the final XFtoWP 1.2 release which is very close to being out of beta. This will check for an XF account when someone logs in to WP and create it if it doesn't already exist.Right now I have a basic bridge which connects users between WP and Xenforo. I have the WP site setup to check against all the information in the Xenforo userdb. So for example, if login on the WP site, it checks the Xenforo userdb and if the user is not found in the WP DB, the user is added to the WP DB. That user can then login on both WP and Xenforo.
XFtoWP lives on the WordPress side so the bulk of its actions are fired from there. You'd need to have users register or login from the WP side to make the connection. One thing in our plans is to offer a custom fields mapping tool which will expand the information you can collect on the WP registration side to pass over to XF to make the WP register process as good as it is on XenForo.As this has a lot more functionality, which we could do with, would it be possible to switch to your system? Right now we push everyone to register via the Xenfoto registration. In your system, can we keep it that way so users still register via Xenforo and then the account will add them to the WP DB? Or, do all new forum users need to register via WP first, or can they register/login via either system?