Note that all Wii consoles come with Wii Sports, one Wiimote and one Nunchuk. I've also mentioned when each deal expires, if specified by the retailer.
Obviously GAME's web only price is the lowest, but there are some good bundles out there (Good Guys and Kmart, for example) if you're interested in those extra controllers and games.
Let me know if you've spotted any better deals than these.
David Jones (until Nov. 8) Console plus Cars: Race-O-Rama and 2nd Wiimote - $469.90 Console plus Mario Kart and 2nd Wiimote - $399.95
Dick Smith (TBA) Console only - $399 Console plus Wii Fit - $547 Console plus Wii Fit and Shaun White Snowboarding - $604.95
EB Games (TBA) Console only - $368 Console plus Link's Crossbow Training and Wii Zapper, Mario Kart, World Sports Party, 2nd Wiimote and 2nd Nunchuk - $488
GAME (until Nov. 11) Console only - $339 (web price only) Console plus Guinness World Records, Mario Kart and Wacky World of Sports - $388
The Good Guys (until Nov. 2) Console plus EA Sports Active, Grand Slam Tennis, Mario Kart and a bunch of accessories - $429
Harvey Norman (until Oct. 25) Console only - $367
JB Hi-Fi (until Oct. 26) Console plus EA Sports Active and Game Party - $399
Kmart (until Oct. 28) Console plus Link’s Crossbow Training with Wii Zapper, Mario Kart, a 2nd Wiimote and a 2nd Nunchuck - $468
Myer (until Oct. 25) Console only - $379
Toys R Us (until Oct. 27) Console only - $369.99