I have been testing Google+ for use within the church where distance is an issue and here are the reasons why I think its BRILLIANT:
1) It's free and you are not limited to 6 users like other free services
2) It's conservative look and feel is more appealing than other video chat-room services.
3) The big main video picture with the smaller pictures for the others has a nice feel about it and works well.
4) The option to share YouTube clips so all can see it is good too and has further scope to share other things.
5) Google is open about wanting to make an API and allow people to create their own solutions.
The last one is interesting for the church as you can imagine the church might want to create their own closed solution and then add something similar to gphangouts.com.
Allow me to quote what Mike Elgan said about the beauty of Google+:
Instead of saying, "I'm going to write a blog post now," or "I'm going to send an e-mail" or "I think I'll tweet something" you simply say what you have to say, then decide who you're going to say it to.
If you address it to "Public," it's a blog post.
If you address it to "Your Circles" it's a tweet.
If you address it to your "My Customers" Circle it's a business newsletter.
If you address it to a single person, it can be a letter to your mother.
Paul Allen (founder of Ancestry.com) is also worth following on Google+.