This helps you embeding your Social-ID and Groups on your WordPress. You can create a Social-ID and Group at http://www.socialidnow.com
No. All you need to know is the Group name or Social-ID numeric ID. But for creating new groups and Social-IDs, you do need a Social-ID account.
Not now. We are looking forward to implement this on our plugin. If you like this, go to our GetSatisfaction page and thumbs up this idea!