Google Hangouts Office Hours

I just finished my first virtual office hours for my online class using Google+ Hangouts. I set up a private circle just for the class, and invited my students to add me to one of their circles, whereupon I added them to the private class circle. I posted the schedule in the circle discussion and simply clicked on the hangout button at the bottom of the message. When they log in to Google+, they should see that I am online:
Pretty cool way to be available to students!