Losing backwards compatibility is a bummer, but losing GameCube controller support is downright painful.
It's really easy to point to Sony as the primary offender when it comes to backwards compatibility since they took out PS2 support pretty quickly. They're not the only ones to take functionality out of newer models though - Nintendo is joining the fray.
A new Wii bundle will be hitting the UK and included in it is a redesigned Wii. The redesign is the same size as the normal Wii, but lacks a flap for GameCube controllers. That means no WaveBird, and worse it means that you're stuck using Wii controllers and Nunchucks for all your games.
"But how will I play my GameCube games without a GameCube controller" you ask. Well Nintendo solved that one by taking out backwards compatibility. No controllers, no games, no nothing. Well, plenty of nothing to be more grammatically accurate.
The new Wii is just hitting the UK for now, but we can surely expect it stateside soon enough.