take a look at linkshare, they're the shit, if you don't mind, this is our ref,
http://click.linksynergy.com/fs-bin/...pe=3&s ubid=0
they are affiliated with a TON of mainstream sites, when it comes to sports, for example, you can promote this site;
http://www.motorcycle-superstore.com/ - maybe it fits what you need, this was just one tho....