hi just a quick follow up - I am a former FlexJobs member and a current FlexJobs employee (Director of Partnerships). I can tell you confidently, both personally and professionally the company is very respected and legit. You can see some of the recent press here:
http://www.flexjobs.com/PressReviews.aspx ALso- we are the official job board of WorkingMother.com (and if you go to their site you can try FlexJobs for 50% off). We have a team a online researchers who locate flexible positions, plus we have several thousand companies who post their flex jobs on our site as well (inlcuding Amex, PwC, many other Fortune 100). Anyway just wanted to share my two cents. Good luck with your job searches!!