For those who like decentralization, there is another thing built on top of Ethereum: https://status.im/
I don't know how it works, it doesn't seem available yet, but it is still interesting to see how it will go on.
@Bloggerschmidt Nice to read you had a good first impression of this app. Please let me know when you will do a review of the app, as I imagine you have a blog, so I can see how viable Ethereum is.