omnidk wrote: I'm using the 'Improved AJAX Login and Register' extension, which let's users register with their facebook, linkedin, and google accounts. If I install Community Builder, will the users table still sync or would there be some issues?
You will have issues.
When you install CB you need to switch to CB Login module and CB registration form.
If you want users to use other network credentials then consider upgrading to get the CB COnnect add-on:
www.joomlapolis.com/cb-solutions/cb-connect