The New Essential Chronology set most of the canon, I think. It established Revan as a light-side male, and The Exile as a light-side female. It also established Jaden Korr as a male (though did not yet specify his species).
All The Old Republic: Revan added was some specific points on his appearance and what happened afterward. And all the appearance points can be discarded, since people look different over time (hair color/length, etc.)
I've been playing TOR, and there was a great easter egg regarding the clan of Revanites on Dromund Kaas.
Click here to see the hidden message (It might contain spoilers)
Their Master was a woman, and when you tell her you thought The Master was a man, she says that the records specifying Revan's gender are spotty and unclear.
It was the year of fire… the year of destruction… the year we took back what was ours.
It was the year of rebirth… the year of great sadness… the year of pain… and the year of joy.
It was a new age. It was the end of history. It was the year everything changed.
The year is 2261.
The place: Babylon 5.