Welcome to 5 Star, Romeo.
Some networks have gotten in trouble for letting affiliate promote on Myspace too, so some of them will drop you without pay if you are caught.
Craigslist does not allow affiliate links either and your ads will get pulled and you could get banned. There are some creative ways to advertise through CL but since technically affiliate marketing is prohibited I don't teach affiliates the ways to circumvent the system.
Your best bets are social networks specific to the market you are targeting and forums that are targeted and allow sigs. The other thing would be to start a blog, hugpage or squidoo lens to try to generate search traffic to your affiliate offers. But you need to find the right niche and use the right keywords in order to optimize your chances of getting traffic.
This may be helpful if you want to learn about social marketing.
Web 2.0 Traffic Generation Blueprint - FREE + Good Reviews
Here's another with ideas:
What's Your Favorite Traffic Source?
We have lots of other threads talking about various ways to generate traffic.
Scan the newbie forum and the social marketing forum for more ideas.