Audioboom is the best for sharing with others, as long as your audio blog is going to be under five minutes. Otherwise, maybe have a look at Spreaker; they let you go up to half an hour, though the app is much more complicated.

There's an app called Vorail where you can post audio blogs. Then you can share them with facebook if you would like to do so. Here is the link to the app. https://itunes.apple.com/gb/app/vorail/id1050527832?mt=8