Hi jhewell,
You know, I did get it to work, and we now stream favorite radio stations daily. Tthe customer support line for the A4 ate up phone minutes and never was available. So...I took the instructions to the Apple Store, along with my laptop, Iphone, Airport Extreme [to see if it was too old to do this] and the darned speaker itself. Despite no reservation, some of the wonderful staff groaned over the instructions with me, and eventually got method C [I think] to work instore using the Apple store network. When I went home I was able to replicate the set up by bringing my A4, and laptop right in front of the Airport Extreme so the WIFI didn't have any excuses not to work. The next discovery was that I can use the A4 successfully in another room even though the 3 buttons to the left never do set up properly -- they turn blue, but one keeps blinking all the time the speaker is in use.
It was an adequate solution for us in our very small rental. In a larger house, I suspect a $99 airport extreme might have been necessary to set up another "wireless hotspot", or whatever the jargon is.
Hope this helps.
Betsy