I believe the rumour is false for the Wii, especially in Australia. Modchips have been legalised in Australia for the main use of Imported games. The government came to the conclusion that piracy is a bi-product of the chip but chose to allow it anyway.
As for the xbox 360, it wouldn't surprise me if they did patch it. As with the PSP, there will be away around the firmware flashing problems and therefore there will be a solution, no doubt.
These rumours have been flying around the internet for a while though. I couldn't find any latest news for this year. Most of the news on fixes for hacks seem to be dated at least a year ago.
21/05/2007
Mario and Sonic at the Olympic Games
Gold Coast, Queensland, Australia