TBH, they didn't seem super surprised or all that upset, but they also didn't tell me to pack and get out, which would be difficult since it's not like there's anyone here to confiscate my security pass and escort me from the building.
So that's some of the weight off my shoulder. Still planning to write my "official" letter on Friday and work out the two weeks, but at least I'm that much closer to be out the door and now in official "What are you going to do, fire me?" mode.