Has anyone experienced this themselves? It seems to happen randomly, where when I wake my iMac from sleep (running Lion .1), it won't be connected to the internet. I know my router is working because my Air and my cell phone can use WiFi. The odd thing is, I have to either wait a while, or use the internet on my Air before the iMac will start having access to the internet. What the heck is going on? Anybody else?