With the DSi XL
arriving April 15, Nintendo's Australian branch has announced a price drop for the original DSi; a move none of the other regional branches have made. It's still pretty expensive, though: the system will now sell for $249.95 (US $233.35) instead of $299.95 (US $280).
The DSi XL will now occupy that $299.95 slot, which explains why Nintendo chose to drop the price of the smaller model. Still, if you're in Australia and you want to be even remotely pleased with these prices, try not to look into how much this stuff costs anywhere else.