Wow, so you're also flying up to Redmond for the Interview? I heard there are about 20 positions currently open in this field.
I'm also a Technical Writer and I will be visiting the campus by the end of this month. I was doing some research in this blog...very insightful.
Have you seen any channel 9 videos specifically related to technical writers? What there work day is like and what kind of interview process they go through?
That would be very insightful. Good luck to you!