Sorry to butt in, but some users may find this useful...
This already works since 1.2 stable (as as far as I am aware should have worked before as well).
Users on my site are able to log in with their facebook accounts, whereby my Joomla will automatically create an account for them. Users can log in with either their facebook details OR their local account details once the profiles are connected (auto if you sign up via facebook, optional for those with accounts). The email verification is skipped for these facebook users only. Admitedly, it works better with JomSocial, where it will pull a few basic details straight into the profile, but that is not much of a boon in any case and Jomsocial is actually quite rubbish if you ask me. In any case a few of us users on the site have asked for CB integration and the makers are looking into it (though again it will only be drawing info from facebook to fill out feilds in the profile and avatar etc).
I use the JFB Connect module/component for this, which you can find on the JED. It is commercial, but certainly works, and has an invite your facebook friends bit and everything.
Though to be honest the reason I built my site is that I hate facebook so not really sure about it and might end up un-oublishing the thing. But this is not because it doesn't work, just because I don't like facebook.
Anyway, just thought the above may be of interest to some,
Best,
NuMoon
Post edited by: NuMoon, at: 2009/03/19 20:00