Thanks2U
TravelPony is a hotel booking service that offers hotels in Australia and worldwide. Smallish selection but good range of hotels, often very competitively priced. For 24 hours, take an extra 9% off any booking using voucher code Thanks2U.
If you're new to TravelPony, get an extra $35 off your booking ($200 minimum before tax) using the referral link provided,http://www.travelpony.com/?rc=wdt4
Actually, I successfully used my $35 new user credit recently for a hotel booking under AU$150, so not sure if terms have changed in the meantime. If you don't want to spend $200, maybe just give it a go!