Yesterday I finally upgraded my two MBP's to Snow Leopard. After the upgrade none of my MBP's could use my wireless network. I thought I'd go in my airport utility and reconfig it. I must have done something really wrong. Since then it won't stop blanking yellow. I've tried unplugging it. I've tried re-doing my wireless network. I've tried restarting it from the airport utility. Nothing works! HELP PLEASE.