Holiday Inn on Flinders is now $285 "Best Flexible Rate" - with the extremely borked suggestion that:
"Canceling your reservation before 6:00 PM (local hotel time) on Wednesday, 2 July, 2008 will result in no charge. Canceling your reservation after 6:00 PM (local hotel time) on 2 July, 2008, or failing to arrive will result in forfeiture of your deposit."
No idea what the 'deposit' is, but presume it is the full amount of the stay.
Advance Purchase rate is currently $257 / night, with no refund rights. Entertainment Card is a bit cheaper, with the same cancellation condition as above.
Rydges is a touch cheaper than before (average of $193.50 per night on the PriorityGuest rate), but have introduced a 1.5% Visa/MC surcharge and 3.5% Amex/Diners/JCB surcharge.
Hilton on the Park $280/night Fully Flex, or $244 pre-paid (Less of course any other discounts you have). Crowne Plaza is still over $300 / night.