Congrats. You had to do it sometime, and now it's done.
I can understand your trepidation. I think it would have been a real cluster->-bleeped-<- if I'd come out at my old job--for years, I was a printer for an international company, at least, until I moved into the desktop publishing division. Most of the people there had very blue-collar mentalities, and the men were very...straight.
Fortunately, I was able to transition at a University of California campus, where the process was essentially a non-issue. I'm not even the only trans employee on my campus.
Good luck, and keep us posted.