Free Mac version released!
Available from Apple's iTunes store at http://itunes.apple.com/au/app/ready-to-go-spoken-english/id767793384
Don't forget that 'Ready To Go Spoken English' is also available for free download for iPhone and Android:
Blog/website for the educational developer Fun Learning Games. We focus on making free or low-cost apps to learn English better. Facebook group: http://www.facebook.com/australianspokenenglish and for our other business http://www.facebook.com/chinese2english