According to an interview about the original epilogue (which she trimmed down because it was "too wordy"
[list]
[*]Harry and Ron are both Aurors (Harry is the Head of the Office)
[*]Hermione is "high up" in the Department of Magical Law Enforcement
[*]Luna has become a "naturalist."
[*]There is a new permanent Defense Against the Dark Arts teacher
[*]There is a new Headmaster at Hogwarts
[/list]