One of the most frustrating things in trying to build page rank is spending time submitting a link to a directory then discover if they list you at all that you are buried so far back that no one new will find your site. There is an alternative, using a bid link directory. Big Web Links Directory was created to give you the ability by using a bid process to be one of the top sites listed, yes, free market driven which is why I liked the concept. Unlike some other directories out there, Big Web Links demonstrates it's additional value since it currently has a page rank of 7, blogs or websites with lower page ranks are helped by being listed on a higher ranking blog. It looks like a well put together directory, and considering the costs of other directories, the current amounts of the bids look very reasonable.