Craigslist is a one stop shop for everything, from a futon to a guinea pig. Many designers use it to find jobs and "gigs." You can search by any keywords you wish, and filter based on "telecommuting" or even "part-time."
In Examiner's interview with Dave Lee, he said, "I find freelance graphics work through Craigslist.org and through networking with family, friends and associates. Individuals and businesses offering graphics work on Craigslist ads usually generate a response by more than one hundred graphic designers. So this is a very competitive area. I did a lot of research on this and found that those offering graphics work may receive fifty or more responses to their ad in just a few minutes."
There are risks, of course. This article by Brie Weiler Reynolds lists some of the "red flags to watch out for." One of these being "no company name." Why would a company not want people to know who they are? The more information the better. If they have more to go on, more qualified individuals will apply. Another is "asking for personal information." A job doesn't need your access to your bank account, obviously. The only thing they might need is information on how to send you money. That doesn't require your pin number.
Craigslist can be a wonderful tool and way to connect. Have you ever seen Craigslist Joe? CL is full of opportunities and connections. (And curb-side couches.) It presents a much broader range of jobs than a local newspaper can, plus the people that post can do so for free. If a company needs one design done, and not an on staff designer, it makes much more since to post a "gig" than to hire someone to payroll. This enables freelancers to work with many different companies at a time, possibly resulting in higher earnings.
Anywhere on the web people can try to take advantage of others, just like in person to person interactions. This shouldn't stop people from interacting. Designers, and any job-seekers, just need to watch for those "red flags."