This is the latest list of offers from Microsoft, there's a mix of gaming, gadgets and computers, hope it helps, there's already great discounts for Boxing Day and a few don't start until then:

Xbox One Game, Accessory and LIVE bundle
Get Forza 5, Xbox One wireless controller and limited edition Forza Xbox LIVE 13 month membership for $199 (save over $50)
Dates: 20 December onwards
Link: Buy Forza Horizon for Xbox 360, car auto racing video game - Microsoft Store - Free shipping. Free returns.6

Boxing Day deal page
Link: Shop Xmas deals | Microsoft Store Australia

Buy Office and get a $25 Store voucher + Norton Internet Security free for 3 months
What: Buy Office H&S, H&B, Professional, Office 365 HP or OMAC H&S/H&B and get a $25 credit to use on the next purchase at Store, plus get a free 3 month Norton Internet Security trial.
Dates: 26 December - 3 January
Link: Shop Buy Office & get 90 days FREE protection from Norton | Microsoft Store Australia

Xbox 360 20% off games and accessories
Dates: 26 December - 9 January
Link: Shop Get 20% off all Xbox 360 games & accessories | Microsoft Store Australia

Xbox 360 20% off LIVE products
Dates: 26 December - 10 January
Link: Shop Get 20% off Xbox LIVE | Microsoft Store Australia

25% off PC accessories
Dates: 26 December - 3 January
Link: Shop Save 25% on our range of PC accessories | Microsoft Store Australia

Windows 8/8.1 + $15 Store voucher
Buy Windows 8, Windows 8.1, Windows 8 Pro or Windows 8.1 Pro and get a $15 Store voucher to spend on next visit.
Dates: 26 December - 3 January
Link: Shop Buy any Windows 8 or 8.1 and get $15 to spend on your next visit | Microsoft Store Australia

Surface RT 32GB $160 off (now $229)
Dates: 25 December - 2 January
Link: Surface

Xbox 360 $100 cashback offer on 4GB console
Get $100 cashback on 4GB console (ie. Console effectively $99)
Dates: 26 - 31 December 2013
Link: Xbox 360 4 GB Console - Microsoft Store - Free shipping. Free returns.


January Offer
Buy Office 365 Home Premium and get a $25 Visa Gift Card

Dates: 4 January - 15 March 2013

Link: Office 365 Home Premium, Office Apps, Cloud Services - Microsoft Store - Free shipping. Free returns.