First I want to make a disclaimer that I am not a member of PPC Bully.com.  That being said, I just downloaded their free toolbar today and I am really impressed.  This toolbar is an invaluable tool to research new campaigns and affiliate offers.   The PPC Bully toolbar gives options to search for new affiliate offers and products, do keyword research, check trends, demographic info, view google ads, and find articles on the topic you are researching.  Naturally, they do have a few limits with the toolbar since it is free.  They limit some of their keyword research with the intention that you will subscribe to their tool.  If you are looking to get started in PPC, I would definitely recommend trying out the free tool bar.  http://ppcbully.com/toolbar/