Lion 10.7.1 upgrade WiFi card not detected

I am having a issue with my Mac Book Pro 15" purchased June 2009. I have upgraded to Lion when it was released. Everything was working perferctly fine. During last few days sometime it shows 'No hardware found" for wifi. After 2-3 times restart the wi-fi comes back. Sometime the it also gets hang. I think this is happening after 10.7.1 upgrade. I have not yet taken to Apple Store for support. If anyone having similar problem and if they have resolved, please post your findings. Thanks,

Apple, please sort this out ASAP.
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    x220 | i5-2520m | Intel ssd 320 series | Gobi 2000 3G GPS | WiFi
    x220 | i5-2520m | hdd 320 | Intel msata ssd 310 series | 3G GPS | WiFi
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