Just got an email. MyFun.com.au have 50% of Movie World, Wet n Wild, and Sea World tickets for 48 hours.
48 Hour Sale 50% Discount tickets must be used by 26 June 2011. No extensions.
i.e. 1.5 weeks emphasis added, thanks Kirt
Children are aged 3 - 13 years inclusive. Pensioner prices are only available to Australian and New Zealand residents. Check eligibility.
A $4.95 booking fee applies per transaction on all purchases through myfun.com.au. A surcharge of 1.5% applies to all American Express and Diners Card transactions.
All tickets are under $40. Seems to be 1 day pass tickets only.
Direct link to the offer:
https://shop.myfun.com.au/attraction-highlight.asp?BestOfID=…
"Discount tickets must be used by 26 June 2011."
Good deal if you can use them within the next 1.5 weeks.