This does NOT have anything to do with avoiding the $99 charge.
The file iphone_sdk.dmg (which is available from ADC after registering free of charge) just contains Xcode 3.1 with the iPhone cross-compiler and the iPhone simulator.
AFAIK it's not even possible yet to sign up for the $99 iPhone developer program.
Freely available from ADC
This does NOT have anything to do with avoiding the $99 charge.
The file iphone_sdk.dmg (which is available from ADC after registering free of charge) just contains Xcode 3.1 with the iPhone cross-compiler and the iPhone simulator.
AFAIK it's not even possible yet to sign up for the $99 iPhone developer program.