WorkAtHomeSpace list plenty of legitimate work at home job leads. As usually the best source of telecommuting job leads is the forum as the job leads are posted on a regular basis.
A good thing to pay attention to when visiting all the recommended home job sites are how the job descriptions are written up. This can be helpful when coming up with search terms to search on when you use the job boards, job search engines, Craigslist, etc. in order to find legitimate telecommuting work.
You want to identify parts of the job description that are specifically related to telecommuting – i.e. phrases like “must have quiet area in the home” or “must have stable, high-speed internet connection”, etc. Ideally you should keep a list of such phrases and start to guage how effective the searches are in bringing up relevant results.