Never mind; it’s all working now. But no thanks to Apple; their supposedly “plug and play” configuration software was a disaster. I know that the number of permutations that they have to deal with is mind-boggling, including a gazillion non-Apple devices, but even so they botched this one. I was trying one of the simplest use-cases – adding a Time Capsule to an existing all-Apple network – and they couldn’t even get this right. Apple has demonstrated in the past that it was willing to hold up a product until the quality (hardware, software and documentation) was good enough; in this case, they failed to exhibit the necessary courage. (Time to re-read the “Evil/Genius” article in Wired.)
And now I have to update the configuration of all of my WiFi client devices. I just did my iPhone; next up is the Nintendo Wii….. Thanks, Vicar!