Yeah I had a thief I called Frodo Stabin (hurthling, duh) and I actually beat the game with him. The hurthlings I think are the perfect race for the class because they'll start with archery as well as skill level four in thrown rocks, which, yeah sounds lame but can actually do wonders to save your life at low level. Plus their agile and tough enough to stay alive in the early game.
And yeah I guess an orcish thief would be pretty sweet, what with having the find weakness and all but if your like me I absolutely dread having new PCs start out with that big ugly "C" in the bottom right hand corner