More to explore:
Google+ Events: Creating an event with Google+
by googleplusupdates on Youtube
How to create a hangout-on-air, integrate with a Google+ event and set it up on YouTube afterwards
What is Google Plus? And why you will want to be doing it!
Visual.ly Create. Cool!
Google Plus communities - how to create and build them up!
Google+: Photo tagging
Introducing Google+ Events
Google+ Events: See everyones event photos in one place
Google+ Events: Make your invitations stand out, via YouTube.