The Lynx GD (Game Drive) has been in development for some time and there has been a good amount of updates about it in the recent weeks, but this is the update you've all been waiting for. AtariAge has received a shipment of these and they are preparing to send them out. You can register your interest to pre-order on the AtariAge store. The Lynx GD will set you back $95 USD (plus shipping).
AtariAge has indicated that a 'premium' version will be available in the future, which will include a professionally made box with either a cartridge insert or cartridge holder, and manual. This 'premium' version will cost slightly more. The version being sold now is the the cartridge on its own, with a manual.