There is now a virus that some unknown hacker created that attaches itself to your Wii Internet Channel browser and can steal personal information, but unfortunately there are no telltale signs that your system has been infected unless Nintendo spots the suspicious data after sending your console in for repairs.
This information was gathered from 8 different forums, including Gamefaqs and IGN, so it appears that this is a real issue that's occurring to many people. 
and i couldnt fine my iphone