not to be a stick in the mud, but there is also a section there for games that are cheaper in australia than elsewhere, but some of the prices of the aussie games vs US and UK are just plain rude. small price differences you could understand for differences in costs of housing/maintaining servers, etc, but then again, as i've said earlier, the cost of doing that in australia would be much higher than in other the US with a smaller market to service.
long story short, there is bugger all chance of anything being done. if anything was (talking more than just the software market), in the short term it would lead to job loses for both suppliers and retailers. retailers are struggling as it is, so reducing profits is going to make things worse.