That was a little misleading. Backlit keyboard definitely works in windows, as I can see now on my 13" MBP 2010. If you installed the drivers from the DVD and the keyboard won't light up after playing with the lighting controls, reinstall the drivers. Or just pick through the DVD until you find the ones that seem like they'd be for the keyboard, and install those so you don't have to go through the whole process.
For sound, you need to run the Apple software update program and download the update to bootcamp. It was a bug with the audio driver that shipped on the DVD.