So where would you go to find a talented freelancer then? (Assuming you don't have any good word of mouth recommendations.) Not sarcasm - I'm generally interested if you have a better way of finding them that's more reliable that google searches or trolling stackoverflow.
There are a number of second-generation sites/agencies out there now that focus on ensuring a quality of both freelancer and client (e.g. toptal.com for devs), or that simply provide matchmaking services (e.g. folyo.me for designers).
Do you have a network on Twitter? I see people looking (and responding to) freelance inquiries all the time. All based on word-of-mouth and friend-of-friend networks.