Optimized Landing Pages

PPC is more than just the front end of getting a user to click, it involves the back end as well.  The back end that I am referring to is the Landing Page through the conversion Funnel.  A couple of examples of good landing pages that get the user to click and right into the conversion funnel are this Checks page and this Post Cards page.  Both allow the user to view the product that they have searched for and get them as deep into the order process.  Another interest page is this on the site Auction Pal: http://www.auctionpal.com/sell/general . This page allows the user to immediately enter the information that they want and can get them to register within a few clicks.