Edgy, all about cutting edge, perhaps bleeding edge, will consist of brand new code and infrastructure. The time has come to introduce some seriously interesting, but definitely edgy, new technologies that lay the groundwork for the next wave of Ubuntu development.
Knot CD 3 is the third in a series of milestone CD images that will be released throughout the Edgy development cycle as images known to be reasonably free of CD-build or installer bugs. They represent very current snapshots of Edgy.
https://wiki.kubuntu.org/EdgyEft/Knot3/Kubuntu