I may not be of much help as i'm in regional Victoria ... but my DD also turns 3 in May (6th of May 2009) next year and her 'cut off time' to be enrolled in Kinder here was back in August this year due to available positions.

It is once per week for 2.5hrs (9.30am to 11am) ... this year it was on a Tues but next year 3year old kinder is going to be on a Mon. The fee is $110 per term. She can start in the middle of the term after she turns 3 or start at the beginning of the term after she turns 3 (i think we start her at the begin of the term).

Prep grade for primary school here the child needs to have turned 5 before April 29th, so will be getting her to start school when she is 5years & 8mths in January 2012.

So, the Kindergarten Director said what they recommend is to do two x years of 3year old Kinder and then one year of 4year old Kinder (which apparently prepares them for primary school).