Absinthe 2.0 was released on Friday the 25th, the long-awaited untethered jailbreak for iOS version 5.1.1, supporting almost every iOS device, including the new iPad 3. Just two days later on Sunday, Chronic Dev Team, one of the developers behind Absinthe along with iPhone Dev Team and others, announced on Twitter that Absinthe has been used to jailbreak at least 973,086 devices.
Additionally, Chronic Dev noted that 211,401 of those devices were the new iPad 3. Considering the tweet was posted on Sunday, it's not much of a stretch to assume the total number easily passed 1 million total devices by the end of the Memorial Day holiday.
The original version of Absinthe was released in January and brought untethered jailbreaks to iOS devices powered by A5 chips, such as the iPhone 4S and iPad 2. An untethered jailbreak means the custom changes added by the jailbreaking process will stay on the phone even after rebooting, as opposed to tethered jailbreaks that need the phone to be plugged into a computer running the jailbreak tool for every phone reboot.
Absinthe boasts a jailbreak process that is "so easy your grandma could do it." The latest version, 2.0.2, is available for download on Mac OS X, Windows and Linux.
Source: Chronic Dev Team