Previously, Apple offered multiple tiers (Select, Premier) at significantly higher prices ($499, $3499) but also included hardware discounts and other perks to membership. It appears Apple may be looking to tempt the large number of iPhone developers to easily jump to Mac development. Existing ADC members accounts will continue as is until they expire, at which time members can then join the new $99/year program. Prospective Mac developers can still download the Xcode tools for free, but without access to the pre-release software and technical support.