It looks like you're new here. If you want to get involved, click one of these buttons!
Heres some info those that want more class/race combos:
Character Classes -> Playable Species Compendium and Speculation List (Part 4)
It is confirmed - in the latest build of the game, we freed up some of the combinations of classes and species. I'll tell you that I have a Zabrak Bounty Hunter on my screen right now.
That being said, absolutely nothing in this regard should be considered 'officially announced' (ie 'This is how it will be in the game at launch'), as we're still gathering feedback and looking for potential issues with combinations we didn't expect.
Choices that might be in a build today might not be there when we ship.