Nintendo does not want modchips invading their little white box.
In an attempt to throw off the persistent efforts of hackers to modify Wii consoles, Nintendo has altered the circuit layout of the system's newest models. Reportedly, these modifcations, which are undetectable through the system's performance itself, make it harder to modify the console without causing permanent damage to it.
These alterations have not stopped some people from attempting to mod the system, however; according to retail channels in Hong Kong, a new version of the Wii modchip may be available within a month. Many of these parties are also speculating about another modification Nintendo may employ, entitled BGA (ball grid array). Such a technique would greatly lengthen the amount of time it would take to craft another modchip to about four months, assumably reducing the number of people who would attempt such a thing.