Everything I have heard and read to date suggested that 2 new teams would enter the A-League in 2008-9. However, a statement from Ben Buckley via Fox (9 October 2007) states that the original agreement with the foundation clubs was 5 years (2010-2011).
Waiting another 2 and half seasons would be bad. Already the teams know each other backwards and barring some accident from the ref, a draw is the most likely outcome. Plus while the talent in the A-League has gone up, there is an argument that the entertainment value has gone down as away teams grind out draws or smash and grab wins with defensive games.
New teams will spread the talent. Keep more talent in Australia. And give more undiscovered players a go. Plus there will be more goals and more wins, particularly at home if far North Queensland and perhaps Tasmania get a go. Also, we get to see more players from Asia.
Forget the consultancy Ben, just do it.