Has anybody had problems with Wifi on Macbooks lately? It's possible this might be related to updates. Here's the story: - I have a Macbook Pro, my girlfriend has a macbook. The WiFi on both stopped working in the exact same way, almost at the same time, seemingly after some updates. - The wireless everywhere else in the house is fine. The iMac, iPads, and xbox live work perfectly. But both macbooks have the same problem... at the same time! - Airport itself works, and my network shows up... but no connection. I get the exclamation mark on my WiFi icon (for both laptops) Anybody experiencing anything similar? I'll post some more specific details, but I though I'd initially post the basic situation... All machines are running Snow Leopard by the way... Any help would be appreciated!