No Airport Card Installed - Post 10.6.6 update

Question

Hey everyone, I have a fairly new iMac (under 8 months old), and it runs beautifully. However, after the latest update 10.6.6, I'm getting a "No Airport Card Installed" when I click on the grayed out wifi icon in the toolbar.
I've gone to the system profiler and it says connected (see results below). If I go into System > Network it's there and working, and I'm actually writing this post on my iMac. But the buggy thing is that it doesn't show in the icon, which in turn, makes apple-based applications think it's not connected to the internet (like iTunes).
I can browse the internet, download stuff, etc. But if I want to stream music through iTunes radio, I can't. It's really quite annoying, as I can't find any information on this.
Any help would be appreciated. Thanks!
Chris
Here is my system profile readout for my airport card:
Card Type: AirPort Extreme (0x168C, 0x8F)
Firmware Version: Atheros 9280: 2.1.14.5
Locale: FCC
Country Code: US
Supported PHY Modes: 802.11 a/b/g/n
Supported Channels: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 149, 153, 157, 161, 165
Wake On Wireless: Supported
Status: Connected

Answer 1

True North wrote:
after the latest update 10.6.6, I'm getting a "No Airport Card Installed" when I click on the grayed out wifi icon in the toolbar.
Welcome to Apple's discussion groups.
Do you mean the menu bar, the strip across the top of the screen?
It might help to reset the connection settings on your Mac using these steps one at a time until it works again, recognizing that, depending on your problem, not all of these steps will make sense:
1) Use the AirPort menu bar item to turn AirPort off, then on again.
2) Try to select your Wi-Fi network from the AirPort menu.
3) In the Network panel of System Preferences delete the AirPort item from the left column, then add it back.
4) In the same panel as (3), define a new location and see if you can make that work.
5) In the same panel, select the AirPort connection item, click the "Advanced" button, select the "TCP/IP" tab, then click "Renew DHCP Lease".
6) In the folder /Library/Preferences ( not <yourhomefolder>/Library/Preferences), move the folder SystemConfiguration onto the Desktop, then restart your computer. See if you can now make your AirPort connection work.
They may not help, but they'll only take a couple of minutes to try. Before you try these, if you have any special network settings on your Mac for things like DSL credentials, note all your network settings, because the latter steps will destroy them. If you got all the way to the last step, if things don't work any worse than before, you can trash the saved SystemConfiguration folder.