wow. i have no idea who you are but i read it because it said 'new job' and i am very jealous. i am currently looking and it STINKS. dont be scared to talk to your boss. remember, you are doing what is best for you and your boss should be able to appreciate it. AND - you already got the job so who cares. you no longer need your boss as a reference.
ooooo i am such a fan of your username.