os x lion how to make the lid open when clamshell mode is on

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Here's the command to make your laptop behave like it did Pre-Lion (courtesy of my friend):
 
sudo nvram boot-args="iog=0x0"
 
Works perfectly for me. If it screws up your system, just zap the PRAM next boot (cmd-opt-p-r) and you'll be back to the default Lion state. Or if you can still get into terminal, this command will get you back to Lion's default state as well:
 
sudo nvram -d boot-args
 
Enjoy!