i hate how they advertise as if the mini is new and re-designed. it only has more memory and built in wireless at the upper price levels. this way you dont have to BTO everything and pay more! they should have just said upgraded instead of new.
I have an old "new" mini, that's a mini from february that's been upgraded so it's just like the "new" ones. Airport is fine, the only time I has an issue was when it was sitting in the corner of a metal desk, but it's not anymore, and it's got full reception. So does my Windows PC that I'm on now.