The Jaffa will be bigger, more muscular and militarily precise in their movements. Heitzman compared them to Spartans in both their clothing and armor choices, preferring function over form, with color tones hearkening back to Greece and Rome. Endowed with peak physical conditioning honed by constant training and a fanatical devotion to achieving higher levels of effectiveness, the Jaffa really will be like the "Steel Curtain." All I know is, if I can be a Jaffa... that's what I'll be playing!
In addition to this nugget o' knowledge, the Stargate Worlds Gallery has been updated with pictures of the Jaffa (see above), vehicles, and containers for Anima Vitru.