If you are in New York and can attend the events they do, the membership is definitely worth the cost.
If you can't attend events, then it may make more sense to use the CFA JobLine; however, as a NYSSA member, you can listen to podcasts and webcasts of some NYSSA events, and I've found them useful.
You'll need two people to sponsor/recommend you in your application. I'm not prepared to sponsor people I've just met through a few posts on a bulletin board, but you should know that CFA charterholders are required to be members of their local societies, so any people you know in NYC with CFAs are probably members of NYSSA and are good people to hit up for sponsorship.