It makes no difference if the original post was deleted... having spoken to the organisers the only news is that Expo WILL be happening in Sydney. The venue is yet to be confirmed as organisers are looking at various options including same venue, Hotel, University etc.
Certain structures of Expo 2009 will remain and others will be subject to change.
As news comes through, public announcements will be made.
Until then, this is all the information there is.... stay tuned!!! 

So is there any hint that it will be in May? Or are we talking a different month?