I’m about half done with this, and just wanted to give an update to those people I know who are awaiting it.
I’m ditching the multiple-plugin thing. Too many complaints and too much confusion. Also, the plugin directory and updaters don’t support it well. So 1.0 will have a checkbox area where you can select the pieces you want instead.
Login works. Register needs some more work.
Automatic publishing now works for both Fan Pages and Applications! I just worked out how to make Application posts through the Graph API properly. Manual publishing isn’t quite there yet.
Widgets are largely unchanged, but will all be rolled into one sub-module.
Fan box got replaced by the Like box, which is the same thing with a different name. So I’m going to keep calling it the Fan Box in the interface.
The bookmark widget is going away, because it doesn’t work properly anymore anyway.
New widgets for the Facebook Social Plugins are working.
Like and Share will remain unchanged, although the Like now uses the XFBML to do its thing. Doesn’t really make a whole heck of a lot of difference, though.
Comments pull-back from Facebook is possible. I know how to do it. I’m debating whether or not to turn them into “full-fledged” comments or just display them separately.
Comments push *to* Facebook is also possible. Meaning that if somebody leaves a comment using FB and clicks the share checkbox, it will send it to Facebook (no popup) and also include the text of their comment (or an excerpt, at least). This is not done yet, but it’s actually quite easy to add now.
All dependence on the FB-Connect library will be gone. Ditto for their PHP library. I’m writing this with pure calls to the Graph API and XFBML. PHP 5 is still required, and there’s still an activation check for that.
One last thing: Upgrading from old versions to the new one will be a hassle. Things will just stop working properly when you upgrade. Can’t be helped. So I recommend deactivating SFC and all sub-plugins entirely before upgrading, then reactivating it afterwards. There will be a note to this effect on the WP plugins screen.