I think you guys are totally underestimating how powerful this wireless functionality could be. At schools/colleges/universities, it's going to be huge if it catches on. Perhaps in the US it's different, but nearly everyone these days has a bluetooth enabled mobile phone and kids love swapping songs on them, the amount of piracy that must go on through the phones is massive.
Anyway, imagine sitting in a lesson or lecture and copying 10 albums from random people. It's going to be utterly massive. 2.4GHz will never be quiet again

. And wifi has decent range - so it could be from the other side of school.
I think it's very interesting concept. I think Apple may get outflanked on this one, badly, unless they put wireless functionality in the iPod.