Pretty impressive software from Voz http://vozme.com/index.php?lang=en that converts any text into a mp3 file that you can listen too. To try the software, highlight this text and click the play button in the side column.
From http://www.makeuseof.com/dir/vozme/
(This post published by WordPress Dash which doesnt seem to have an easy way of adding links 🙁 )