Umano was an app with real voice actors reading content from 1000s of blogs, printed text, self published stories. Unfortunately it is no more as 12 June 2015. This is the best app I have found to replace it.
No current curated content, but a can send links, copy and paste, hook to storage services like drop box and the app will read the material. Voices are not live, but there are multiple free and paid voices to choose from.
It is worth paying for better quality voices for 2 reasons. 1. The experience of listening to the material and 2. If we want quality apps we need to support the people taking the time and energy to create tools that have the ability to change the way we live and enrich our lives beyond using an hand held computer to play bird games.
Denverh about Capti Voice