Vintec - Spend $120+ on Penfolds Wine & get a 35 Bottle $599 wine cabinet for $100 [plus shipping]
The fine print is at the link, but basically purchase, in one transaction, 6 or more bottles of Penfolds wine worth $120 or more (Thomas Hyland, Koonunga Hill, or Bin range - of which at least 2 bottles need to be from the Bin range) and then send in the claim. One cabinet only per household, and purchase must be made *at a participating outlet*. [There is no definitive list available - either check at your favourite store or see some of the comments to this thread where others may have found a participating store. It appears that Dan Murphy's is *not* participating]
Vintec/Transtherm is a well known maker of these things, so not a bad deal and the Penfolds wine is generally pretty decent. Personally, I bought 3 bottles of Bin 128 (to cellar) and 3 bottles of Koonunga Hill Cab Sav (to drink now) to take me just over the $120 mark.
As a generalisation, these are not as good as a "real" cellar (for example the better made, heavier, more expensive, in general the better protection against things like vibration from the motors but even the best of these can't help but transfer some vibration, plus if the power fails the temperature is likely to rise faster than with a larger cellar), but most people cannot afford to have a proper temperature & humidity controlled wine cellar built in their house. Alternatively you can use an external storage company but that can be both expensive and inconvenient so this is definitely better than just whacking the bottles in a cupboard or under the stairs or on top of the fridge etc etc etc.
Details on the cabinet are here:
And details on the deal itself are here:
Promotion ends 31/3, with last claims to be received by 30/4/10
P.S. I was alerted to this through my membership of the wine society (http://www.winesociety.com.au/). They actually stated that the cabinet would be a V30 SG 2e which is similar but has two separate controlled zones so can also be used for storing two types of wine for serving - eg white/fizz at around 10 degrees, red around the 18 degree mark - and has an RRP of about $699. Possibly this is a special deal that the winesociety has arranged, but more likely is just a miscommunication. I've contacted them and will update when I find out more. Update - I can confirm that the wine society got it wrong - its's definitely not the 2e but will be the single zone model.
P.P.S. These apparently take about 1Kw/24H so (roughly) will cost around $0.18/day to run. Obviously this will vary depending on your energy costs, how much wine is in it, how often the door is opened and for how long, and what the ambient temperature is. Still, that works out roughly at $5 per month.
Edit: Just worked out that this cabinet actually should be able to hold easily 32 bottles(as shown in the picture), and in a pinch the maximum is actually 35.