I have had my MBP for 3 years now and ever since I upgraded to Lion (a month or so after it was released) I intermittently Lose ability to access wifi. On top of screen wifi symbol just turns to an outline and says 'wifi: no hardware installed' it generally happens when I use after standby/sleep. Apple care have confirmed there was a problem with Lion and iMacs, which is exact same problem I have but have won't admit that it may be Lion and continue to insist that its my hardware, and as it is out of warranty there is nothing they can do. After to pointless appointments with a 'Apple genius' I have still not got any closer to resolving this issue. Both times the guy started by saying 'must be your hardware' but then realised it work with different OS so insisted that a reinstall would solve but it hasn't. I called Apple care who seemed unwilling to help but when I mentioned I believed the issue was to do with Lion then he said they have given extended warranty to people who upgraded to Lion. I went through some trouble shooting with them but it was the usual work for a few hours then problems re-occurs. When I called back I was put straight through to a level two guy who said I need to run it with a 'erase and install' and see if the problem occurs with a black canvas so to speak. It still does and all they have said is that I keep trying 'erase install' It is basically ridiculous how Apple won't admit that they may be at fault and are trying to say its my MBP. Has anyone had similar issue with Lion or experienced similar difficult with Apple support/CS?