I think this article is misleading, it seems that "AirPort Disk Utility" no longer exists in 10.7 Lion (and possibly hasn't existed since 10.5).
You're right. I'll see if I can pass that information along to someone who can fix it.
Good luck, I've treid with this one:
http://support.apple.com/kb/HT4635
Notice how outdated it still is. Not only that, but how it's got wrong info, like 1st Gen Express Model #.
Maybe you got more weight than I do...
I'll try reporting that one too. Besides your comment, the description for the 802.11n AirPort Express doesn't match what I see in AirPort Utility 5.6 and it doesn't include the original AirPort Express or the new dual-band AirPort Express.
"AirPort Disk Utility" no longer exists in 10.7 Lion (and possibly hasn't existed since 10.5).
