Well, the worst of it is behind me. Got a call from my boss today asking when I had intended to let him know I was going to work for someone else, I told him as soon as the background check cleared and it was certain I'd get it. I guess that means the background check is coming along nicely, 'cause they already talked to him, and now I don't have to break the news to him anymore.
I had thought about having Jon break the news via skywriting above the bosses office, but apparently proper names and expletives are really expensive...