http://7dollaroffers.com/
If you're short on cash, 7 Dollar Offers lists sites that use the $7 script so you get paid instantly to your Paypal account.

Here's two second tier PPCs I've made a lot of money from in the past...However, they're not nearly as goos as they used to be, AdSense has just killed them - But still worth a look for silver sites.
SearchFeed:
http://www.searchfeed.com/rd/AffiliateInfo.jsp?p=1925&trackID=D2322628773

RevenuePilot:
https://secure.revenuepilot.com/jsp/home.jsp?id=2067