My understanding is that the sell-on price for these games remains high as a direct result of them being much sought-after in order to install Homebrew - can anyone confirm?
Also Dan, doesn't turning off the internet connection also do the same job as the PIN thing?
I suppose so, but don't you want to play online, stream stuff from another computer or NAS box in the house, or use the Today and Tomorrow Channel...?
By the way, Smash Brothers will be the most update resistant, because you run the game, the game itself reads the SD card directly, and then the game gets exploited.
The rest require you to copy a saved game with the exploit to the internal memory using the Wii Menu, you launch the game from the Wii Menu, and the game reads the saved game and gets exploited. Nintendo update the Wii Menu every so often to detect new exploits, delete the ones you've already got, and not let you copy them to internal memory but they can't do much about the Smash Brothers exploit when Smash Brothers is running.