Looks like Chromium Bug Tracker might have spotted some early builds of Key Lime Pie on a Nexus 4 and a Nexus 7. Chromium of course spots the bugs on new builds and devices, and it came across build number KRS36B on these Nexus devices. You can see why we a re all buzzing about that first letter in the build.
As you can see, the letter K appears at the beginning of the build number, just like Jelly Bean build numbers started with a J, and ICS builds started with an I, and so forth. Nothing huge, but nice to know that some early Key Lime Pie builds are being tested and ran through the gauntlet. Rumors suggest that Key Lime Pie will show its face sometime this fall, with the unveiling of a new Nexus 10 and possible Nexus 5. Let us know what you guys think about this.
Source: Droid-Life