I bought my Wii on launch day. Haven't had any issues until now.
1.)Standby(orange light) Unit stays warm, During gameplay unit is hot.
2.)Disc drive became really loud when reading discs.
3.)GC games lag, take a long time to load.
4.)Used the Wii-fi connection for a week because it didnt work well, so I bought a wire dongle, which works perfectly.
When sending in you Wii Console you better have something else to play becasue its going to take about a month.