Hi Lenny
1. The option for social sharing will be available from the next version of the extension .
2. For email notification about up coming events, the extension is integrated with popular Joomla newsletter extensions : Acajoom, CC Newsletter, Acymailing. One users registered for your events, they will be registered to these mailing lists and you can use one of these extension to create newsletters and send to your registrants about new events .
Thanks,
Tuan