Oddly enough this tool is being hosted on Seaturtle.org, which we guess is a way to help hide it by keeping its name discreet and obscure, and definitely not as obvious as Apple-tracker.com. The website will offer users a grid in which it lists the availability of Retina iPad minis for every Apple retail store in the US. This tool also appears to be crowd sourced, meaning that if an area runs out of stock or if the information is unavailable, users will be able to edit the individual cells accordingly. As it stands walk-in sales are not allowed until supply has been stabilized, so you’d have to make a personal pickup.
In any case as it stands, carriers such as AT&T and Verizon have announced that they are backorderd on the Retina iPad mini, so hopefully this tool will be able to help out with those looking to get their hands on the tablet.