Just installed Lion on my 2011 MBP. Installation went as expected, no problems. So after it's all done, I'm unable to connect to the internet. I'm able to connect to my network's shared drive, but I simply cannot connect to any website. Software Update doesn't work either. Network diagnostic shows no problems...so basically as far as my MBP is concerned, it's connected just fine. Yet I cannot access the internet at all. I've tried restarting, shutting down, connecting and reconnecting to my Wifi (which happens to be an Airport Extreme), all to no avail. Anyone else encounter this? Any suggestions?