Craigslist is great for finding apartments, cars, old stereos, questionable sexual partners and vintage records.
Scripts??? Not so much.
Up here, in San Francisco area where it started - its 'wide and deep' with ads. Some excellent paying jobs 'in the industry' IE Lucasfilm and Pixar regularly place ads for animators, programers, management personel and such.
Ton's of 'copy/credit/meal' only jobs for aspiring wannabe filmmakers.
Really, it depends on where you are and what you are looking for.