THe concessional cap for over 50's has just been halved so the most you may contribute as a concessional contribution (i.e. taxed at 15%)is $50k. Under 50 $25k.
If you are self employed (i.e. less than 10% of your income comes from employment as an employee)I am of the understanding you may claim a deduction for your contribution (be careful not to exceed the caps) in your tax return at the end of next financial year for 09/10. You cannot make a contribution now to reduce your tax liability in 08/09 fin year as 30 June has passed.
If you are employed my understanding is you can implement a strategy to salary sacrifice part of your income which will have materially a similar effect. Just be careful with sal sacrifice though as it is only a prospective and there's a few traps to watch out for.
