I decided to migrate to a new account because the URL of my original account had my old name and I already changed it once so I wouldn't be able to change it again.
I created a new account last fall and came out en masse to everyone this summer with a link to my new profile. When all but 2 accepted were re-friended I deleted my old account (about two weeks).
I do post some transition related stuff (milestones, funny episodes) on my new account, but use a custom list for people who know.