Currently the only thrown weapon is the net/bola. As I was reading through the talent trees today, I had an idea for a ninja-like character using the Bounty Hunter's Assassin & Gadgeteer specs along with the Hired Gun's Merc Soldier spec. However, there are no thrown weapons to hurl at my enemies!
Personally, I'd just take the combat knife melee weapon, change the skill to ranged (light) and increase the cost to 50. Don't give it limited ammo, so it's a bunch of thrown knives instead of one. I'm just babbling at this point, so I'll just ask FFG to give us some thrown weapons, since there is support for them in the talent trees!