According to a Twitter update from jailbreaker Will Strafach, multitasking can be enabled on the iPhone 3G by making a simple edit to a plist document. Strafach writes that all that is needed to enable the feature is to set “multitasking=TRUE” on the capabilities plist in the file “N82AP.plist;” notably, this requires root access to the device. Apple has said that it was leaving multitasking off the iPhone 3G and second-generation…