[ubuntu] iPhone Tethering with Handy Light?

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http://ubuntuforums.org – I recently downloaded the iPhone app "Handy Light" which contains an Easter Egg allowing you to tether a laptop to the phone to use the 3G as a wireless network. The only instructions I can find are for Windows or Mac. Anybody know how to do this with Ubuntu? I have an iPhone 3G running OS4, in case that matters. Thanks. (HowTos)